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$17.00 USD
価格

AMETHYST 'TWINNING' STONE BRAZIL 2.55 CTS [ST6739]

1434
2

SKU
寸法(mm)
12.000 x 9.000 x 3.000mm
重さ (CT)
2.550

SEDA GEMS

AMETHYST TWINNING STONE

This is a natural stone which has some interesting lines in it from its formation.

Mined in Brazil.

Well polished

Nice collectors stone.

Weight 2.55 cts app

Size 12 x 9 x 3 mm app


TWINNING

 

Twinning form as a result of an error during crystallization. Instead of a "normal" single crystal, twins will often appear doubled where two crystals appear to be growing out of or into each other, like Siamese twins. Some twins however are not even identifiable outwardly and some minerals in fact have been found to be just a twinned variety of another mineral. Accidental relationships are not considered twins, such as when two distinct crystals grow more or less randomly side-by-side or toward each other, etc. Also epitaxial overgrowths are also not twins. These occur when one mineral of similar structure, but different chemistry, grows onto and "continues" the earlier mineral's crystal.. Twins are recognized by penetration angles or notches in the crystal, mirror planes that do not normally occur on a specific mineral and crystallographic techniques not normally available to the average collector. Twinning often has a dramatic effect on the outwardsymmetry  of the mineral either by raising or lowering the symmetry. Twinning can make an orthorhombic mineral appear hexagonal or make a trigonal mineral appear monoclinic.


 Amethyst  is  a purple form of quartz and it is the Birthstone  associated with February..Amethyst occurs in primary hues from a light slightly-pinkish violet to a deep grape purple. Amethyst may exhibit one or both secondary hues, red and/or blue. The ideal grade is called "Deep Siberian" and has a primary purple hue of around 75–80 percent, 15–20 percent blue and (depending on the light source) red secondary hues  

配送業者 配送先Australia その他の国への配送
FedEx $12.00 / 3 $39.00 / 10
:国
FedEx 、 2以上のアイテムを含む注文で$12.00に割引されます
世界のその他の地域
FedEx 、 2以上のアイテムを含む注文で$39.00に割引されます
Registered Shipping $9.00 / 7 $16.00 / 21
:国
Registered Shipping 、 2以上のアイテムを含む注文で$9.00に割引されます
世界のその他の地域
Registered Shipping 、 2以上のアイテムを含む注文で$16.00に割引されます

AMETHYST  'TWINNING'  STONE BRAZIL 2.55 CTS [ST6739]
Qld, Australia
が所有している sedagems

  • spreadingadder
    spreadingadder
    ポジティブ

    Got here fast! Beautiful blue color! Awesome folks to deal with. Thank you Seda gems!

  • spreadingadder
    spreadingadder
    ポジティブ

    Fast shipping! Happy with these bright stones! Always great doing business with Seda Gems and Seda Opals!

  • rickferreira626
    rickferreira626
    ポジティブ

    A gorgeous pair blue topaz stones. This is one happy customer.

  • e155293
    e155293
    ポジティブ

    Thank you beautiful stone

  • opalgoat
    opalgoat
    ポジティブ

    Well packaged, beautiful gems

5%
クーポンコード SEDADEALS
まで有効
4th Apr 2025

監査

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発送詳細

配送:
$16.00 21日 ( Registered Shipping経由)
発送元:
Australia

支払いオプション

  • paypal
  • stripe
この販売者は、 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 : 1289151
始まります : 1st March 2025 10:33 pm PST
* すべての価格はUSDで表記されています