The Environmental Impact of Pearl Farming (And Why it’s Positive)

The Environmental Impact of Pearl Farming (And Why it’s Positive)
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Key Takeaways

  • Pearl shell are natural filter feeders, helping maintain healthy marine ecosystems by filtering seawater.  
  • The environmental impact of Saltwater pearl farming is fundamentally different to mined gemstones, as Australian pearl production relies on thriving marine environments rather than extraction.  
  • Australian South Sea pearl fisheries were the world’s first certified sustainable pearl fishery under the Marine Stewardship Council (MSC), recognising decades of responsible management. 
  • Responsible pearling supports both people and planet, protecting marine ecosystems while creating employment and long-term economic opportunities in remote Australian communities.  

Summarise This Article

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If you're here because you're researching sustainable jewellery, it's natural to question where pearls fit. After all, farming anything from the ocean might seem like it comes with an environmental cost. The reality for Saltwater pearls is surprisingly different. 

Unlike many industries that extract resources from the natural world, pearl farming in Australia depends entirely on healthy marine ecosystems. Clean water and thriving biodiversity aren't just desirable; they're essential to what we do. Without them, there are no pearls. 

That makes the environmental impact of pearling fundamentally different from most gemstones. Rather than working against nature, responsible pearl farmers have every reason to protect it. Their livelihoods rely on maintaining pristine marine environments that allow pearl shell to flourish for years before producing a single Saltwater pearl. 

Australia has taken this philosophy one step further. Today, Australian South Sea pearl fisheries operate under the world's first certified sustainable pearl fishery standard, independently assessed against globally recognised environmental benchmarks. This certification reflects decades of responsible fisheries management and environmental stewardship. 

So, when considering the environmental impact of pearl farming, the more relevant question may not be whether pearls harm the environment, but whether Australian Saltwater pearl farming is one of the rare industries whose business model is to protect its environment.

Are Pearls Good for the Environment? 

In many ways, yes. Saltwater pearl shell are remarkable marine organisms. As filter feeders, they draw seawater across their gills, removing microscopic algae and other substances, and throughout this process they contribute to cleaner and healthier water while requiring no supplementary feed or fertilisers. 

The Pinctada maxima is native to the tropical waters of north Western Australia while the Pinctada fucata is native to the sub-tropical waters of New South Wales. Rather than introducing a new species into a new environment, Australian pearling works with species that have naturally existed along our coastlines for millennia. Pearl shell are either responsibly collected from carefully managed wild fisheries or produced through accredited hatcheries before being grown within their natural habitat. 

Freshwater pearl farming follows a different model. Most Freshwater pearls are produced in lakes and rivers rather than the ocean. While many Freshwater farms operate responsibly, farming systems and environmental conditions vary between producers. Saltwater pearl farming in Australia benefits from vast ocean environments, like at our Cygnet Bay and Broken Bay pearl farms, and is governed by the MSC Fisheries Standard's 28 performance indicators, one of the most detailed sustainability frameworks applied to any wild fishery. 

Ultimately, healthy pearl shell require healthy oceans. Ocean surface temperatures in the Australian region have already risen by around 1°C since 1990, and this warming has coincided with a decline in pearl production, a reminder that the industry is directly exposed to the effects of climate change rather than insulated from them. If water quality declines, pollution increases, or marine ecosystems become stressed, pearl quality declines too. Farmers therefore have a direct environmental incentive to protect the very ecosystems their pearl shell call home.

What Are Pearls?

How Do Pearl Farms Impact Marine Ecosystems Around Australian Coastlines? 

Australian pearl farms exist in some of the country's most environmentally significant marine regions, including the Kimberley coast around Cygnet Bay Pearl Farm (WA) and the lower Hawkesbury River near our Broken Bay Pearl Farm (NSW). 

Both our South Sea and Akoya pearls require clean, stable marine conditions to grow high quality pearls over several years. Even subtle changes in water quality can affect shell health, nacre formation and ultimately pearl quality. 

Because of this, pearl farmers become long term custodians of the environments in which they operate. Maintaining excellent water quality, protecting natural habitats and monitoring ecosystem health are not simply environmental responsibility, they are essential to producing high quality pearls. 

Research undertaken through the Kimberley Marine Research Station (KMRS), located at Cygnet Bay Pearl Farm, continues to improve our understanding of the unique ecosystems around the Dampier Peninsula. This collaborative research supports responsible management of one of Australia's most remarkable marine environments while strengthening knowledge of the Kimberley coast. 

The coastal habitats surrounding our farms, including mangrove forests, seagrass meadows and salt marsh, are also some of the most efficient carbon sinks on the planet, and protecting the water quality these ecosystems need is part of maintaining them. 

Cygnet Bay Pearl FarmBroken Bay Pearl Farm

Our Filter Feeders 

Every pearl begins within an oyster. Both our Pinctada maxima and Pinctada fucata spend their life filtering seawater to obtain food. 

As water passes over the pearl shell's gills, microscopic algae, plankton and organic particles are removed and consumed naturally. This process helps recycle nutrients and contributes to healthy marine ecosystems. 

While filtration rates vary depending on pearl shell size, water temperature and food availability, pearl shell continuously process significant volumes of seawater throughout their lives. 

At scale, this filtration is substantial. Research cited by The Nature Conservancy estimates that a single hectare of oysters can filter around 2.7 billion litres of seawater and remove roughly 225kg of nitrogen and phosphate each year, while also supporting an estimated 10,000kg of carbon removal annually. Figures will vary by site and stocking density, but the broader pattern holds across naturally functioning coastal ecosystems, that healthy oyster populations measurably improve water quality rather than simply avoiding harm to it. 

Importantly, Saltwater pearl shell only thrive where water quality remains high. Healthy oceans literally produce better pearls. 

Our Planet

What Are the Main Environmental Concerns with Pearl Cultivation? 

No industry is entirely without environmental impact, and responsible pearl farming should acknowledge this. Potential environmental considerations include: 

  • Fuel use from boats servicing offshore farms. 
  • Mooring and anchors that require careful placement to avoid sensitive habitats. 
  • Interaction with marine wildlife. 

Responsible Australian pearl farms actively manage these risks through strict environmental management systems, ongoing monitoring and compliance with regulations. 

At Pearls of Australia, both Cygnet Bay and Broken Bay pearl farms have achieved Ecotourism Australia Eco Certification, recognising their commitment to environmentally responsible tourism and sustainable operations. 

Combined with Australia's comprehensive fisheries management framework and independent MSC certification, these measures ensure environmental impacts are continuously assessed and minimised. 

Acknowledging these challenges is important because genuine sustainability is about measuring impacts honestly and continuously improving our performance.

Our Pearl Farms

Sustainable Practices in Pearl Farming 

Sustainability isn't achieved through a single initiative. It comes from thousands of careful decisions made throughout the farming process. Responsible pearl farming includes: 

  • Farming native pearl shell species within their natural habitats. 
  • Maintaining low density farming practices. 
  • Carefully managing pearl shell collection under strict quotas. 
  • Long growing periods that prioritise quality over volume. 
  • Ongoing scientific monitoring. 
  • Research partnerships with institutions including James Cook University, Macquarie University and the University of Western Australia. 
  • Responsible maintenance of farming infrastructure. 
  • Long-term investment in ecosystem health. 
  • A pearl farmer at Broken Bay Pearl Farm in NSW travels to the Akoya pearl shell long lines on the lower Hawkesbury River.
  • A row of pearl farming vessels at our Cygnet Bay Pearl Farm move along our Pinctada maxima pearl shell long lines cleaning and maintaining the Australian South Sea pearl shell.
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The Environmental and Social Impacts of the Pearl Industry 

Environmental sustainability cannot be separated from community sustainability. Pearling has supported Australian communities for generations, particularly in Broome and northern Australia, providing skilled employment across regional and remote areas where economic opportunities are often limited. Cygnet Bay Pearl Farm alone welcomes more than 10,000 visitors a year, supporting tourism-based employment alongside farming roles. 

Research undertaken through KMRS also contributes valuable knowledge about the Kimberley's marine ecosystems, helping inform future conservation. 

Environmental stewardship and regional employment are closely linked in this model: pearl farms depend on healthy oceans to operate, and in turn provide long-term jobs and tourism income to the remote communities where they're based.

The World's First Certified Sustainable Pearl Fishery 

One of the strongest indicators of environmental responsibility isn't what a company says about itself, it's what an independent organisation is prepared to verify. 

In September 2017, Australia's South Sea pearl fishery became the world's first pearl fishery certified against the Marine Stewardship Council (MSC) Fisheries Standard, following an assessment of around eighteen months carried out by independent auditors (Marine Stewardship Council, 2017; Pearl Producers Association). The fishery was successfully recertified in 2023, extending certification to include hatchery-produced pearl shell alongside responsibly managed wild collection. 

The MSC standard is one of the most rigorous environmental certification systems for wild fisheries in the world, assessing fisheries against 28 performance indicators across three core principles: sustainable fish stocks, minimal environmental impact, and effective fisheries management (MSC Fishery Certification Guide). To be certified, a fishery must meet minimum thresholds on every indicator and an average score of 80 across each principle, a benchmark the MSC considers "global best practice." 

Independent, accredited auditors reassess certified fisheries every year, with a full recertification review every five years, ensuring standards continue to be met over time (MSC). For consumers, this means the certification provides confidence that Australian South Sea pearls originate from a fishery independently assessed against internationally recognised environmental standards, not simply a self-declared claim.

  • A pearl diver holds a Pinctada maxima pearl shell that has been wild caught at our Cygnet Bay Pearl Farm in Western Australia.
  • A panel containing 6 Pinctada maxima pearl shell floats under the ocean's surface, suspended by a long line at our Cygnet Bay Pearl Farm in Western Australia.
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Nothing Goes to Waste: The Life of Mother of Pearl 

Sustainability isn't only about how pearls are farmed, it's also about what happens to the shell once the pearl has been harvested. 

Long before cultured pearls existed, it was the shell itself, mother of pearl, that first drew people to Australian waters. Aboriginal communities along the northern coast traded pearl shell for tens of thousands of years, and by the early 1900s Broome had become the world's largest supplier of mother of pearl, prized for buttons, buckles, cutlery handles and furniture inlay. That trade only collapsed in the 1950s when cheaper plastic buttons replaced shell almost overnight. 

Today, mother of pearl has found a second life, this time as a byproduct rather than the main catch. Once a pearl shell has finished its productive life on the farm, generally after producing two or three pearls over several years, the nacre-lined shell doesn't go to waste. It continues to be used for jewellery, inlay, buttons and shell veneers, giving a second purpose to a material that would otherwise be discarded. Researchers in Western Australia have even begun exploring nacre as a natural, biocompatible material for bone grafts in orthopaedic surgery, turning what was once a waste product into a genuinely regenerative resource. 

Compare that to the lifecycle of a plastic "pearl": Once it's damaged or discarded, it doesn't biodegrade, it simply persists. A natural pearl shell, by contrast, is calcium carbonate, the same material found in coral and limestone, and every part of it can be reused, repurposed or will naturally break down over time. 

History of Mother of Pearl

Real Pearls vs. Synthetic and Costume "Pearls" 

Not everything marketed as a pearl actually comes from an oyster. Understanding the difference matters, both for the look and durability of the jewellery, and for its environmental footprint. 

Most imitation or "faux" pearls sold in costume and fast-fashion jewellery are built around a core of glass, plastic or resin, which is then coated in multiple layers of a pearlescent lacquer to mimic the shine of real nacre. Common versions include: 

  • Plastic pearls – a plastic bead core with a synthetic pearlescent coating. 
  • Glass pearls – a solid or hollow glass bead coated in layers of pearl essence. 
  • Shell pearls – genuine shell fragments coated in resin, sometimes marketed misleadingly as "real." 

These imitation pearls are inexpensive and can look convincing, which is exactly why they dominate fast-fashion jewellery. But that affordability comes with an environmental trade-off: plastic-cored pearls are typically synthetic polymers that don't biodegrade, and low-cost costume jewellery is generally designed to be worn briefly before being discarded, contributing to the broader problem of jewellery as disposable fashion. 

A genuine Saltwater pearl, by comparison, is grown by a living oyster over several years, requires no synthetic inputs to produce, and, cared for properly, can last for generations rather than a season. It's a helpful distinction to keep in mind: a "pearl" isn't always a pearl, and the material behind the shine says a lot about the footprint of the piece you're wearing. 

We also partner directly with Take 3 for the Sea, supporting coastline clean-up initiatives that target the plastic pollution genuine pearl farming has no part in creating. 

Can Pearls be Ethically Sourced? Yes, Here's What To Look For 

Not all pearls are produced under the same environmental or ethical standards. If sustainability is important to you, then consider: 

Choosing responsibly grown pearls allows consumers to invest in jewellery that reflects both exceptional craftsmanship and ethically grown gemstones.

Which Brands Sell Environmentally Friendly Pearl Jewellery Made in Australia? 

If you're looking for environmentally responsible pearl jewellery produced in Australia, transparency should be your starting point. 

At Pearls of Australia, every South Sea and Akoya pearl can be traced back to either our Cygnet Bay or Broken Bay pearl farms, where generations of expertise are matched by a long-term commitment to environmental stewardship. 

When you choose Australian grown Saltwater pearls, you're choosing jewellery that celebrates nature and the responsibility to protect it. 

Sustainable Pearls & Ethical Jewellery

Pearls of Australia Jewellery Selection

Classic collection

Our collection of classic pearl jewellery is a modern take on timeless, staple pieces suitable for all ages and styles. From simple studs to accent your everyday work outfits, to the perfect day-to-night essential pendant, ring, or strand, that you’ll never want to take off, we have you covered with the understated beauty of Australian South Sea or Akoya pearls.

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Kimberley Lily collection

This popular jewellery collection draws its inspiration from the stunning natural lily varieties of the Kimberley region of Northwest Australia, where even today, new species are being identified. Throughout this rugged and remote area over 3,500 varieties have been recorded, leading it to be regarded as one of the world’s biodiversity hotspots for this beautiful flower.

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Seagrass collection

Until recently, the powerful contribution that seagrass makes to the preservation of a pristine marine environment has mostly gone unnoticed. Seagrass meadows form part of ‘blue forests’ (alongside mangroves and saltwater marshes) which are vital for coastal communities and significant for our global climate being amongst the most efficient carbon sinks in the ocean.

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Discover The Legacy of Australian-grown Pearl Jewellery

Every pearl carries a story shaped over time, by nature and culture.  

Explore our collections and discover our Saltwater pearl jewellery. 

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A person holds their hand up, wearing an expandable ceramic pearl ring featuring a gold Australian South Sea pearl and a matching bracelet.

Find the Perfect Pearl Jewellery for you!

Prefer to talk to one of our Jewellery and Pearl experts before purchasing one of our pearl pieces? They would love to help you in any way, please contact them either by sending an email to hello@pearlsofaustralia.com.au or call (08) 6478 6886.

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Environmetal Impact of Pearls FAQs

Are pearls good for the environment? 

Responsibly farmed Saltwater pearls can have a positive impact on the environment. This is because pearl shell are natural filter feeders that rely on healthy marine ecosystems. Successful pearl farming depends on protecting clean oceans rather than extracting resources from them.

Can pearls be ethically sourced? 

Yes. Look for transparent sourcing and place of origin, along with independent certification such as MSC.

Are all pearls real, or are some made of plastic? 

Not all "pearls" are genuine. Many costume and fast-fashion pieces use glass or plastic beads coated in a pearlescent lacquer to imitate the look of a real pearl. Genuine Saltwater pearls are grown naturally inside a living oyster over several years and contain no synthetic materials. Discover the difference between real vs fake pearls in our Pearls of Wisdom blog.

What happens to the shell after the pearl is harvested? 

The nacre-lined mother of pearl shell is a valuable byproduct, not a waste product. It's commonly used in jewellery, inlay, buttons and shell veneers, and is increasingly being researched for uses such as biocompatible medical materials, ensuring very little of the oyster goes unused.

How is MSC certification different from a company simply claiming to be sustainable? 

MSC certification is carried out by independent, accredited third-party auditors, not by the fishery or company itself. Certified fisheries are assessed against a detailed set of environmental and management standards, monitored annually and fully reassessed every five years, providing independently verified assurance rather than a self-made claim.

Are Australian pearls more sustainable than pearls from other countries? 

Australian South Sea pearl fisheries hold the world's first MSC certification for a pearl fishery, alongside strict quota systems, low-densityfarmingand long growing periods. While pearl farming standards vary by country and producer, independent certification and transparent sourcing are the clearest ways to compare sustainability credentials.

Do pearl farms harm marine wildlife? 

Well managed Saltwater pearl farms use longline systems suspended in the water column rather than seabed structures. Responsible farms also manage risks such as boat fuel use and mooring placement through strict environmental management systems.

Is pearl farming affected by climate change? 

Yes. Ocean surface temperatures have risen by around 1°C since 1990, and this has coincided with a decline in pearl productionindustry-wide. Rather than being insulated from climate change, pearl farming is directly exposed to it, which is part of why farmers have a strong incentive to support broader marine conservation, including protecting carbon-absorbing mangrove,seagrassand salt marsh habitats near farm sites.