THE PREMIER MARKETPLACE FOR REAL GEMS
$11.00 USD
价格
3929
7

ARAGONITE CRYSTAL CLUSTER 74 CTS [MX1615]

存货单位
尺寸(毫米)
x x mm
重量 (cts)
类型
Specimen
颜色

ARAGONITE CLUSTER SPECIMEN 

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

Weight  74 cts app

Size  34x 25x22  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.

运输商 运送至:国家 运送到世界其他地区
FedEx $12.00 / :几天天 $39.00 / :几天天
:国家
FedEx 对包含 2 或更多商品的订单折扣为 $12.00
世界其他地区
FedEx 对包含 2 或更多商品的订单折扣为 $39.00
Registered Shipping $9.00 / :几天天 $16.00 / :几天天
:国家
Registered Shipping 对包含 2 或更多商品的订单折扣为 $9.00
世界其他地区
Registered Shipping 对包含 2 或更多商品的订单折扣为 $16.00

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.
:城市,国家
已验证
:总反馈

  • gemarab
    gemarab
    积极的

    Great and clear sapphire, beautiful cut ! Great packaging

  • js20031
    js20031
    积极的

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

  • js20031
    js20031
    积极的

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

审计

Gemstone Sheriff计划允许我们的会员请求对任何产品进行审核,该审核由独立的 Gemologist 人员完成,该资格人员评估商品描述和图片的准确性。

送货细节

船运:
$16.00 :通过 Registered Shipping 计算天数
发货自:
Australia

付款方式

  • paypal
  • stripe
该卖家在 Australia 的交易中添加 10.00% 税。

概述

列表类型 : Standard
产品编号 : 86581
开始 : 7th November 2024 08:00 pm PST
* 所有价格均以:货币为单位