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5862
13

63.50 CTS RARE EMERALD GREEN DIOPTASE FROM KAZAKHSTAN MGW136

SKU
Dimensions (mm)
x x mm
Weight (cts)
Type
Specimen
Colours

MINERAL GEM WORLD

RARE DIOPTASE

This is a natural untreated specimen on its natural matrix from Kazakhstan

Great specimen.

Weight 63.50 cts app

Size 40 x 31 x 13 mm app

Dioptase is an intense emerald-green to bluish-green copper cyclosilicate mineral. It is transparent to translucent. Its luster is vitreous to sub-adamantine.

Late in the 18th century, copper miners at the Altyn-Tyube (Altyn-Tube) mine, Karagandy Province,Kazakhstan thought they found an emerald deposit of their dreams. They found fantastic cavities in quartz veins in a limestone, filled with thousands of lustrous emerald-green transparent crystals. The crystals were dispatched for analysis as they thought they were Emeralds.

Dioptase is a very rare 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

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sedagems
sedagems
Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and gems stones he has collected on his many buying trips world wide. All stock has a money back guarantee as your continued business is our business.
Mermaid Waters, Australia
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  • js20031
    js20031
    Positive

    AAAA+++ Very Happy! Just like the pic.

  • js20031
    js20031
    Positive

    AAAA+++ Very Happy! Just like the pic.

  • wesam
    wesam
    Positive

    Very nice stone

5.00%
Coupon code SEDADEALS
Valid Until
7th Nov 2024

Audit

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Shipping Details

Shipping:
$16.00 21 days via Registered Shipping
Ships from:
Australia

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Overview

Listing Type : Standard
Product ID : 253689
Starts : 25th October 2024 06:00 pm PDT
* All prices are in USD