I received six rocks in my purchase order all as expected, and I will use mineral box again
DR Congo
Dioptase Crystal Cluster, DR Congo
SKU · oe266
$185.00
Free worldwide shipping over $38
Deep emerald dioptase in two colonies on a buff, sugary matrix from DR Congo, the crystals sharply terminated and near-black until light gets inside them. 7.9 × 4.3 × 6.9 cm, 235 g.
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Authenticity guaranteed
Hand-examined + numbered
Worldwide shipping
Insured tracked delivery
Display-ready
Acrylic base included
14-day return
No-questions return window
Specimen details
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About this specimen
Dioptase this saturated reads almost black until light finds a way inside and the green ignites. Two separate colonies of it have taken hold on a buff, sugary matrix. The larger group builds a low mound of stubby, sharply terminated prisms; the smaller one to the left runs as a loose chain, single crystals standing alone on the rock with pale mint dustings of finer growth between them.
Dioptase is a hydrated copper silicate, CuSiO3·H2O, and copper supplies that green — the same element behind malachite’s green and azurite’s blue. It forms in the oxidised upper levels of copper deposits, and Congo material has long been the standard against which dioptase colour is judged. Mohs 5 sounds forgiving, but the mineral has good rhombohedral cleavage and the terminations chip without much provocation.
7.9 × 4.3 × 6.9 cm and 235 g, with both crystal groups on one broad face and a plain back that lets it lie flat or lean. Photographs are of this piece exactly as it sits, matrix and all.
About Dioptase
Dioptase is a silicate mineral recognized among collectors for its crystal form and distribution.
About DR Congo
The Democratic Republic of the Congo — above all the Katanga Copperbelt — is a world-class source of secondary copper and cobalt minerals.
Frequently asked questions
Will I receive the exact specimen shown?
Yes. Every specimen is a single, one-of-a-kind piece, and the photographs show the exact item you will receive — never a stock photo.
Is this Dioptase natural?
Yes — specimens like this form naturally. As is standard in the trade, some pieces are gently cleaned or trimmed; we photograph the actual specimen and describe its origin and condition conservatively.
How is it packed and shipped?
Orders ship worldwide with fully insured, tracked delivery, carefully packed to protect fragile crystals. A display base is included.
Can I return it?
Yes — there is a 14-day return window.
What collectors say
★★★★★4.97· Verified reviewsEverything was good with my order I will buy from them again in the future
I am very pleased with the rock specimen. It was just like described.
The fluorite is absolutely beautiful! It was packaged very carefully, and the seller communicates quickly. I highly recommend buying minerals from this shop😀
I received the mineral exactly as pictured. It's not an expensive mineral, but it's very beautiful. Thank you for the prompt shipping and excellent service. I highly recommend this shop😉❤️
The mineral I received was exactly as pictured. It's not flashy, but it's a QR code fluorite that I've always wanted, and it's very beautiful. I love it!🥰
fluorita muy hermosa de gran tamaño, vendedora muy atenta siempre en comunicacion, el envio llego antes de la fecha programada, empacado con mucho cuidado, gracias
Very fine Sheelite of high quality and weight. Lovely with rich orange color. Packaged well and beautiful with stand included. Thank you- wonderful seller - great shop!!! Hugely recommended.
Absolutely stunning specimen. Packaged well! Thank you for including a free stand as well it’s much appreciated! Took a little while to ship out but it’s all good!! Thank you so much. I love it!
Beautiful authentic stone. Very fast shipping. Excellent 👍
Lovely piece from a like seller with great communication. Indian quartz, a charming cluster. Very pleased
Reçu très rapidement. Très beaux cristaux.
Clear, in perfect condition, which ia rare by itself, and here also location makes it a real collection best tier item. Thank you 🥹
Another stunning mineral from Maggie. It has a CHARACTER which is not so often to get. I'm in love with every single piece from Maggie and this one is no exception.
It's FENOMENAL. I'm so happy I decided to buy it. Cristals are in perfecf shape, big... I'm speachless. I think it's absolutely one of my best specimens. Thank you!
I'm obsessed with this fluorite. It's like the universe frozen in the box... Amazing. Can't stop looking at it 🥰
I have other wanadynites but this one is my favourite. Cristals itslef are small, but the overall composition is georgous 😍
Beautiful. Secured perfectly, so all these little needles can now feed my eyes 🥰
Perfect! On of my favourites on pink-purple shelf from now on 🥰
Absolutely beautiful. I thought it would be smaller, so nice surprise 😇
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Dioptase Crystal Cluster, DR Congo
$185.00