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$49.00 USD
価格
4620
5

0.640 KILO NATURAL CRYSTAL SPECIMEN MS 1909

SKU
寸法(mm)
x x mm
重さ (CT)
Certified Gemstones
いいえ

CRYSTAL SPECIMEN

SIZE 100 X 80 X 55 MM

ON WOODEN STAND CUT TO SHAPE

CRYSTALS masses have consolidated from aqueous solution or from molten magma. The vast majority of igneous rocks belong to this group and the degree of crystallization depeds primarily on the conditions under which they solidified.

 

Such rocks as granite, which have cooled very slowly and under great pressures, have completely crystallized, but many lavas were poured out at the surface and cooled very rapidly; in this latter group a small amount of amorphous or glassy matter is frequent.

 

Other crystalline rocks, the evaporites such as rock salt, gypsum and some limestones have been deposited from aqueous solution, mostly owing to evaporation in arid climates. Still another group, the metamorphic rocks which includes the marbles, mica-schists and quartzites; are recrystallized, that is to say, they were at first fragmental rocks, like limestone, shale and sandstone and have never been in a molten condition nor entirely in solution.

 

The high temperature and pressure conditions of metamorphism  have acted on them erasing their original structures, and inducing recrystallization in the solid state.

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Introducing MyGems, your ultimate online destination for exquisite gems and minerals. With over two decades of trading expertise in Australia, we bring you a curated selection of the finest treasures from around the world. Explore our collection and indulge in the beauty of nature's creations, all at MyGems.
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  • youngergirl44
    youngergirl44
    ポジティブ

    Quick shipping with FedEx to the US. The artifact is exactly as described. So cool to own a bit of history like this!

  • youngergirl44
    youngergirl44
    ポジティブ

    Quick shipping with FedEx to the US. The stone has the polarization expected with real Iceland spar. I'm very happy with this purchase!

  • youngergirl44
    youngergirl44
    ポジティブ

    Quick shipping with FedEx to the US. It was well packaged. The one I received did have a small crack and chip in the lip, but stuff like that is expected with a natural material like this. I'm happy with my purchase.

  • guest345831
    guest345831
    ポジティブ

    Paid and shipped - no feedback left after 100 days

監査

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発送詳細

配送:
$12.00 Registered Shipping 経由の日数をカウント
発送元:
Australia

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この出品者は、Australia での取引に 10.00% 税金を追加します。

概要

リストタイプ : Standard
製品番号 : 369586
始まります : 7th November 2024 04:00 pm PST
* すべての価格は:通貨で表示されます