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Caldera Gem


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Caldera Gem

An exclusive and highly curated selection of diamonds and gemstones for jewellers, designers and seekers of high quality.

A gemmologist inspects a gemstone under a loupe

Gemmologist Sourced

Our collections are a testament to our unwavering commitment to excellence. Each gemstone we source is considered for its visual appeal, structural integrity and design aesthetic.

We are experienced and dedicated gemmologists,
driven by a profound appreciation for the beauty and unique individuality of natural gemstones.

Our expertise ensures that every stone we source
meets our stringent standards for authenticity, brilliance, and quality and is handpicked with precision and care, sourced from reputable, ethical and trusted sources.

Shop Our Collections
Square Cushion Cut Yellow Sapphire Gemstone

Industry Professionals

We collaborate closely with jewellers, designers & jewellery
artisans from Australia, the USA, United Kingdom, Canada, Hong Kong, Malaysia & Singapore, offering attractive trade discounts, exclusive wholesale website access and full service & support.

Our gemmologists are qualified with the Gemological Institute of America (GIA), the Gemmological Association of Great Britain (Gem-A) and the Gemmological Association of Australia (GAA).

Wholesale Registration
★★★★★ Trustpilot Review
Truly Excellent Service
I had been thinking of buying a green sapphire for a while & I can honestly say that the customer service & the quality of the sapphire I bought are both second to none. If I could give Calderagem 6 stars I would!
~ Q & A Live Attendee, Republic of Ireland
★★★★★ Trustpilot Review
Peach Sapphire
I purchased an absolutely beautiful peach sapphire from Caldera Gem. I still haven’t made it into anything yet but have a few ideas and just love looking at it! I couldn’t find what I wanted in any of the stores and a search online led me to their website. I was surprised...Read More
~ Michelle, Great Britain
★★★★★ Trustpilot Review
Colombian Emerald
I recently had the pleasure of purchasing a Colombian emerald from Caldera Gem, and I must say, I am thoroughly impressed. From the moment I sent my enquiry I was blown away by the exceptional service provided....Read More
~ Prue Anderson, Australia
★★★★★ Trustpilot Review
After a fruitless search for the perfect yellow sapphire I finally found what I wanted at Caldera Gem. I was a bit hesitant to order something so expensive online but talking to them really put my mind at ease...Read More
~ Kylie, Australia
★★★★★ Trustpilot Review
Blue Sapphire
A few months ago I bought a blue sapphire from Caldera Gem and was blown away by the quality. The service was excellent and they sent me a number of additional photos and videos of the stone to help me decide on it.....Read More
~ Katie Barron Naturopath, Australia

Education & Guides

Famous Gemstones and Their Legends

Famous Gemstones and Their Legends: Mystical Tales

Humans have always been fascinated with shiny rocks, and throughout history, people have been willing to spend fortunes to acquire the rarest and most beautiful gemstones. However, the allure of ge...

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Gemstone Cutting and Polishing Techniques Mastery

Gemstone Cutting and Polishing Techniques Mastery

The art of cutting and polishing gemstones has been practiced for centuries. Highly skilled gem cutters transform rough stones into glittering objets d'art using specialized tools and techniques. C...

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Essential Tips for Caring for Gemstones Safely

Essential Tips for Caring for Gemstones Safely

Gemstones are not only exquisite pieces of nature's art but also precious possessions that require proper care to maintain their beauty and value. To ensure that your gemstones continue to sparkle ...

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