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ARAGONITE CRYSTAL CLUSTER -SPAIN 43.55 CTS [MX9586]

3078
4

SKU
Afmetingen (mm)
16.000 x 15.000 x 9.000mm
Gewicht (cts)
43.550
Type
Specimen
Kleuren

ARAGONITE CLUSTER SPECIMEN 

This is a natural specimen from Spain showing strong  cluster of crystal development.

Weight 43.55 cts app

Size  16 x 15 x 9 mm app

Aragonite occurs in two distinct places Spain and Morocco. This crystal cluster is from a pocket in a Moroccan lava bed, where it formed at high pressure and relatively low temperature. At surface conditions, aragonite is actually metastable, and heating it to 400°C will make it revert to calcite. The other point of interest about these crystals is that they are multiple twins that make these pseudo-hexagons. Single aragonite crystals are shaped more like tablets or prisms.

Aragonite is calcium carbonate  with the same chemical formula as calcite, but its carbonate ions are packed differently. That is, aragonite and calcite are polymorphs of calcium carbonate. It is harder than calcite (3.5 to 4, rather than 3, on the Mohs scale) and somewhat denser, but like calcite it responds to weak acid by vigorous bubbling. You may pronounce it a-RAG-onite or AR-agonite, though the majority of American geologists use the first pronunciation. It is named for Aragon, in Spain, where notable crystals occur.

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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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19054 feedback

  • martin11
    martin11
    Positief

    Great thank very much, lovely pearls.

  • philsgems
    philsgems
    Positief

    Nice piece of rough. thankyou

  • philsgems
    philsgems
    Positief

    Nice stone. Thankyou

  • philsgems
    philsgems
    Positief

    Have received the rough. Nice colour. Thankyou

  • ryumaru
    ryumaru
    Positief

    Beautiful ametrine. Very fast delivery. Professional seller

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2nd Jan 2025

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Overzicht

Vermeldingstype : Standard
Product-ID : 758341
Begint : 18th December 2024 08:45 pm PST
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