Investment Stones

Certified Diamonds for Investment or Custom Jewellery

At Stelios Jewellers, we specialise in loose diamonds for sale in Perth that are investment grade, GIA certified, and ethically sourced. Whether you are planning a custom engagement ring or diversifying your SMSF with a tangible asset, our curated selection includes natural diamonds, coloured diamonds, and premium shapes ready for setting.

Buying a loose diamond has never been easier. You can now view detailed photos, examine diamond certificates, and access expert advice from a trusted Perth diamond dealer with over 30 years of experience.

TYPES OF STONES

Pink Diamonds

Red Diamonds

Blue Diamonds

What people are saying…

I needed guidance to learn about Investment gem stones. I searched the web site and decided on Stelios, as he has a separate heading for Investment. After about an hour of discussing the logistics of buying an investment stone – what is giving the best return, storage, insurance, resale and the likely best return that I could expect. I also learnt about the importance of colour, clarity and the pros and cons of each cut.. Stelios worked to get me the best stone at my stated price. Not once did he suggest that I spend more money. Do I trust Stelios? My actions speak louder than my words.

Anne Barrett

Tangible & Multi-Purpose Investment Asset

“Diamonds aren’t just a girl’s best friend…”

Natural Fancy Coloured Diamonds are tangible and uniquely multi-purpose assets unlike shares, bonds, and other financial investments.

“Since diamonds are tangible assets, they can be insured against loss or damage, especially when the diamond in question is set in jewellery, which is a great comfort to investors. Intangible assets like stock will never have this insurance option!”
Mark Kiesel, PIMCO

A diamond will continue to appreciate with no cost to the asset itself. A diamond will look the same in 1,000 years as it did on the day it was first polished, even if someone takes it out to wear every day. As such, buying loose diamonds for investment is truly worthwhile.

Concentration of Wealth

Investment diamonds and rare gemstones are the world’s most portable form of wealth, enabling you to carry millions of dollars in your pocket.

Natural Fancy Colour Diamonds represent an incredible concentration of wealth compared to any other asset in the world. Undoubtedly, it’s worth considering purchasing loose NFCDs to diversify your investment portfolio.

The amount of value that is packed into 1 gram of investment grade NFCD far outstrips that of any other asset. Depending on the year and date, such expensive assets as a bar of gold, a bar of platinum, or even a valuable work of art do not pack in as much value into one gram as an NFCD!

As an example, a 1 gram (5ct) fancy vivid pink diamond has been worth $10 million, while 1 gram of gold on the same day was worth only $35!

Diamond Investment Options in Australia

Buying loose diamonds for investment is ideal for a balanced and diversified portfolio.

Are all diamonds good investments?

All diamonds are beautiful, but unless their quality and origin are exceptional, they would not generally be considered good investments. This is why Stelios Jewellers offer only the very best loose diamonds to buy for investment in Australia.

Are some investment diamonds better than others?

NFCDs from mines with depleted or dwindling stocks are more highly sought after than those from mines with an abundant supply.

Stelios Jewellers currently specialise in loose red, blue and pink diamonds. Pink diamonds are regarded as rare commodities and buying them for investment is certainly worthwhile.

Are all investment grade diamonds good investments?

Pink, red and blue diamonds are rare, with less than 0.01% of all diamonds mined globally being classified as Natural Fancy Coloured Diamonds (NFCDs). This is an industry term used to describe coloured diamonds.

If NFCD’s had a rarity scale:
• An NFCD would have a rarity scale of 7/10.
• An investment grade NFCD would have a rarity scale of 9/10.

Investment grade NFCDs exhibit extremely high qualities in their Colour, Clarity, Carat and Cut, which makes them sought after by collectors and investors around the world.

One of the features of a good diamond investment in Australia is an active re-sale market to provide sellers with buyers, and both with a means to establish a fair value when the time comes to sell. Generally, the maturity of the market for NFCD’s here in Australia and around the globe is one of its most attractive selling points.

A Media Term View

Buying loose investment diamonds and gemstones is considered to be a great option for investors who want to diversify their portfolio by acquiring stable, medium to long-term assets.

Gemstones are not subjected to the same price volatility compared to other investments, such as listed shares. To maximise their true growth potential, a medium to long-term view is necessary.

Single Stone Investments

Investment diamonds from AUD$50,000.
Investment gemstones from AUD$20,000.

As the name suggests, single stone investments are a single NFCD or rare gemstone. Stones are chosen based on colour rarity, meaning good characteristics in terms of hue, clarity, grade and carat weight.

view our single stone options by colour

Why Choose Stelios for Loose Diamonds in Perth?

Certified and Inspected: All stones come with GIA or IGI certification, including full grading reports.
Photos and Specs Provided: We share precise specifications and visuals so you know exactly what you are buying.
Ethically Sourced and Conflict Free: Our diamonds follow the Kimberley Process and uphold responsible sourcing.
Q Report Insurance: Protect your diamond from the moment you purchase with independent, specialist jewellery cover.

Whether you are searching for the perfect engagement ring stone or a smart investment, Stelios offers loose diamonds in Perth with clarity, credibility, and care.

What to Know Before Purchasing Loose Diamonds

Understanding diamond specifications is essential when purchasing a loose stone. Stelios Jewellers is the best place to buy a loose diamond because we give you access to:

Independent certification (GIA or IGI)
Clear, detailed photographs of the actual stone
Full explanation of quality factors
Transparent pricing from a reputable source

We help you understand what makes a certified diamond valuable and ensure you make an informed decision.

Diamond Certification and Quality: The 4Cs Explained

Our certified loose diamonds are evaluated based on the 4Cs:

Cut: The precision of the cut affects how a diamond reflects light. A well-cut diamond sparkles brilliantly from every angle.
Colour: The less colour in a white diamond, the higher its value. Traditional grading begins at D (colourless) and descends.
Clarity: Assesses internal inclusions and external blemishes. Fewer imperfections result in a higher clarity grade.
Carat: Measures the diamond’s weight. While size adds value, it must be considered with clarity, cut, and colour.

The better a diamond scores across the 4Cs, the more desirable and valuable it is. Colourless stones with excellent cuts and few blemishes are the most sought-after by collectors and investors.

Pros & Cons

Pros

When a WA mine closed, it took 90% of the world’s pink diamond production with it.
This is a commodity that has not been affected by any economic crisis.
Low level of risk.
Demand for rare investment quality gemstones has continued to grow on the back of limited worldwide supply.
Over the past 30 years there have been no recorded dips in the average wholesale price per carat on investment quality precious stones.
The most concentrated form of wealth.
A way to transfer wealth from country to country.

Cons

Global demand decreases.
Finding another mine.
Paying too much for investment.

Types of Diamonds: Natural, Lab Grown, and Coloured

Natural Diamonds

Natural diamonds are mined from the earth and take millions of years to form. They hold lasting value and remain in demand for both jewellery and investment purposes.

Lab Grown Diamonds

Created from pure carbon in a laboratory, lab-grown diamonds are optically identical to natural ones. However, they are not used for investment due to limited resale value and market volatility.

Coloured Diamonds

We offer a range of naturally formed fancy coloured diamonds in rare shades like pink, blue, yellow, and green. These are highly desirable for their beauty, rarity, and investment potential.

Popular Shapes

From round diamonds to cushion cut, princess, oval, marquise, and more, we help you select the best shape for your purpose. Our team explains the length to width ratio, brilliance, and design considerations to ensure your selection suits both your taste and goals.

Investment Grade Diamonds and SMSF

Loose diamonds are a powerful tool for asset diversification. High-grade stones offer:

Exceptional concentration of wealth
Longevity with no deterioration over time
No correlation to stock market volatility
Portability and international liquidity

We work with SMSF trustees and high-net-worth investors seeking physical assets with enduring appeal and consistent appreciation. All investment-grade diamonds are certified, and insured.

Ethical and Conflict-Free Guarantee

Our commitment to responsible sourcing includes:

Conflict-Free Diamonds: None of our stones have been used to finance civil wars or armed conflict.
Kimberley Process Certified: We only deal in diamonds that have a traceable origin and ethical mining history.
Human Rights Standards: Our diamonds are sourced without any exploitation or abuse in their production chain.
Digital Certification: All stones include digital certificates, which add to security and resale assurance.

We do not stock blood diamonds or anything outside of ethically sourced diamonds.

Browse Loose Diamonds in Perth Today

Ready to explore our curated collection of loose diamonds? Whether you are looking for a centre stone for an engagement ring or a long-term investment, we invite you to contact us or visit our studio in Perth.

Call us on (08) 9481 0548, email, or use our online booking form to arrange a private consultation.

Stelios Jewellers, Perth’s trusted diamond store for certified, conflict-free, and investment-ready stones.