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ARAGONITE CRYSTAL CLUSTER 85 CTS [MX1610]

SKU
Afmetingen (mm)
x x mm
Gewicht (cts)
Type
Specimen
Kleuren

ARAGONITE CLUSTER SPECIMEN 

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

Weight 85 cts app

Size 34 x 27x24  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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FedEx wordt verdisconteerd tot $12.00 bij bestellingen met 2 of meer artikelen
Rest van de wereld
FedEx wordt verdisconteerd tot $39.00 bij bestellingen met 2 of meer artikelen
Registered Shipping $9.00 / :dagen dagen $16.00 / :dagen dagen
:land
Registered Shipping wordt verdisconteerd tot $9.00 bij bestellingen met 2 of meer artikelen
Rest van de wereld
Registered Shipping wordt verdisconteerd tot $16.00 bij bestellingen met 2 of meer artikelen

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.
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Geverifieerd
18988e feedback

  • gemarab
    gemarab
    Positief

    Great and clear sapphire, beautiful cut ! Great packaging

  • marcopaulo
    marcopaulo
    Negatief

    Not as pictured and underweight by 1.52ct.

  • marcopaulo
    marcopaulo
    Positief

    As pictured but unweight by .14 ct, will accept.

  • js20031
    js20031
    Positief

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

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Overzicht

Vermeldingstype : Standard
Product-ID : 86576
Begint : 9th November 2024 08:00 pm PST
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