Dioptase (I)
Dioptase (I)
Dioptase (I)
Dioptase (I)
Dioptase (I)
Dioptase (I)
Dioptase (I)

Dioptase (I)

Regular price $250.00
/

DIOPTASE
WITH QUARTZ

Sanda Mine
Mindouli District
Pool Dept.
Congo, Africa

Cabinet
2.5 x 2.95 x 1.3 Inches
6.5 x 7.5 x 3.5 Centimeters

A very sparkly specimen of dioptase and quartz on matrix combine to form a really great example of the beautiful dioptase Congo is known for producing. Druzy quartz is spread across the crusty matrix with a cluster of dioptase crystals forming a peak in the middle. Small nooks and crannies across the matrix host additional well formed groups of dioptase allowing for several great angles when viewing/displaying.

Dioptase was named in 1797. Its name is derived from a combination of the Greek words Dia, which means "through" and Optasia, which means "to see". This is regarding the ability to see internal cleavage planes within transparent to translucent crystals of Dioptase.

Dioptase is an uncommon mineral found mostly in desert regions where it forms as a secondary mineral in the oxidized zone of copper sulfide mineral deposits. However, the process of its formation is not simple, the oxidation of copper sulfides should be insufficient to crystallize dioptase as silica is normally minutely soluble in water except at highly alkaline pH. The oxidation of sulfides will generate highly acidic fluids rich in sulfuric acid that should suppress silica solubility. However, in dry climates and with enough time, especially in areas of a mineral deposit where acids are buffered by carbonate, minute quantities of silica may react with dissolved copper forming dioptase and chrysocolla.

The Altyn Tube mine in Kazakhstan still provides handsome specimens; a brownish quartzite host distinguishes its specimens from other localities. The finest specimens of all were found at the Tsumeb Mine in Tsumeb, Namibia. Tsumeb dioptase is transparent and often highly sought after by collectors. Dioptase is also found in the deserts of the southwestern US. A notable occurrence is the old Mammoth-Saint Anthony Mine near Mammoth, Arizona where small crystals that make fine micromount specimens are found. In addition, many small, pale-green colored crystals of dioptase have come from the Christmas Mine near Hayden, Arizona. Another classic locality for fine specimens is Renéville, Congo-Brazzaville. Finally, an interesting occurrence is the Malpaso Quarry in and near Agua de Oro Argentina. Here​, ​tiny bluish-green dioptase is found on and in quartz. It appears at this occurrence, dioptase is primary and has crystallized with quartz, native copper, and malachite.


CREDIT: MINERALS.NET & WIKIPEDIA

MINERALS:
We guarantee the mineral specimen you purchase will be the exact item you receive. It is important to us that you enjoy your mineral specimen as much as we enjoyed sourcing it for you. We use professional photography and video to show you every inch of the specimen using optimal lighting/setup conditions. If you want to view a specimen from a certain angle or lighting source we are happy to provide more images/videos at your request.

Minerals over $1,000 include a certificate of authenticity from Invenio Fine Minerals. We only issue a certificate of authenticity for minerals we sell.

Measurement Descriptions:
Thumbnail: 0.2 to 3 Centimeters / .0625 - 1.118 Inches
Miniature: 3+ to 5 Centimeters / 1.125 - 1.96 Inches
Cabinet: 5+ to 9.5 Centimeters / 2.0 - 3.7 Inches
Large Cabinet: Greater than 10 Centimeters / Greater than 4 Inches

Minerals pictured attached to an acrylic base will be delivered attached to the base. We can unmount the specimen for you if you prefer.
We offer basic and custom mineral mounting services, contact us for more info.

PURCHASING:
We use Shopify for our online checkout system, Invenio Fine Minerals does not store your personal or banking information outside of the Shopify system. All of our transactions are secure through the Shopify system, if you have any questions please contact us.

All sales final. 


SHIPPING:
We use premium packaging materials to protect mineral specimens, every order is carefully packaged and thoughtfully protected. 

Shipping in the United States:
Free shipping in the United States!

Tracking is included on every purchase
Insurance is optional, please read below


Worldwide Shipping:
$55 flat for all international orders* 
*Certain restrictions and additional charges may apply depending on buyers location*

We only ship orders to the UK and EU with a value over $200 USD

We ship international with USPS Priority Mail - Tracking is included.

Invenio Fine Minerals does not charge VAT or import fees on international orders

Buyer is responsible for all import taxes and fees.

Insurance is not included on international orders.

US Shipping Insurance:
Insurance is not included on all orders. We insure packages on a case-by-case basis, if you would like to insure your package please contact us.

Damage or Loss:
If your mineral is damaged or lost during shipment we will work with you to compensate you for the issue. Shipping times are currently longer than usual because of COVID so please be patient if your tracking is not updating regularly.

If your package arrives damaged please keep ALL of the original packaging as it may be required by the shipping service for an insurance review. Contact us immediately with any issues.

Please unpack your mineral/s with care, we are not responsible for damage during unpacking.

💎 RECOMMENDED 💎