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Coloured Diamonds and Gemstones

Your Coloured Diamonds and Gemstones Deserve More Than Just a Price: They Deserve Expertise.

At Diamond Brothers, we know that coloured diamonds and gemstones are more than just beautiful. They are rare, meaningful, and valuable. From rubies and emeralds to sapphires and fancy-coloured diamonds, each stone is unique.

With over 25 years of experience in Antwerp, we buy and evaluate all types of coloured diamonds and gemstones. Whether you want to sell a loose stone, a ring, or an heirloom, our experts give you an expert valuation.

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Types of Coloured Diamonds & Gemstones We Evaluate and Buy

We assess and purchase a wide range of precious coloured diamonds and gemstones, including:

Coloured Diamonds
Rubies
Emeralds
Sapphires
Vintage & Antique Stones
Certified & Uncertified Stones

Each gemstone is carefully evaluated by experts to determine its true market value based on international demand.

Why Choose Diamond Brothers?

Free Expert Valuation

Our gemologists provide independent appraisals of coloured diamonds and gemstones, whether loose or mounted.

Best Offers Based on Market Demand

We use current international gemstone market data to provide the best offers.

Fast & Secure Payment

Once you accept our offer, we ensure payment within 24 hours, directly to your bank account.

Secure FedEx Shipping

Complimentary insured FedEx pickup from all major European countries

What We Look for When Evaluating Coloured Stones

Origin & Rarity – For example, Colombian emeralds, Burmese rubies, or Kashmir sapphires hold premium value.
Carat Weight & Size – Larger stones (1 ct and above) attract higher demand.
Colour & Transparency – Vivid, evenly saturated colours are the most prized.
Treatment Disclosure – Untreated or minimally treated stones command premium offers.
Cut & Setting – Quality cutting enhances brilliance and value.
Certification – Recognised lab certificates (GIA, SSEF, Gubelin, IGI) strengthen trust and pricing.

Start Your Valuation Today

Fill in our simple online form or book an appointment at one of our trusted European locations to sell coloured diamonds and gemstones for the best price.

Get Started:

Send your coloured diamonds and gemstones in via secure FedEx shipping for a free consultation.
Schedule an in-person meeting in your city, or visit Antwerp for an in-person consultation.

Make an Appointment