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$990.00 USD
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171.90CTS GEM QUALITY PALLASITE SLAB SERICHO KENYA TBM-2194

存貨單位
尺寸(毫米)
71.000 x 58.000 x 2.230mm
重量 (cts)
171.900
Treatment
No Treatment
類型
Specimen
顏色

Sericho Meteorite 

PALLASITE
KENYA
BI COLOURED SHUCKED OLIVINES


The Sericho pallasite meteorite was officially "discovered" in 2016 when some large masses were purchased from villagers in Isiolo County, Kenya. However, the meteorites were known for much longer with tales of the larger masses being played on when villagers were children. Sericho meteorites are found in a strewn field over 45km long with pieces weighing from less than one kilogram to masses as large as 500 kilograms.

The olivine crystals of Sericho are generally rounded and vary in color from gemmy green to orange. The metal-rich areas of the Sericho pallasite show well-developed Widmanstätten patterns. Small individual pieces of the meteorite often show evidence of having been torn apart. Some pieces have patches of remaining fusion crust. The meteorite continues to be collected from the area with over 2.8 tons recovered as of the time it was officially classified.

Modern meteoriticists use the term "pallasite" to describe a certain structural class of stony-iron meteorites that contains abundant silicate inclusions in a nickel-iron matrix. Usually, the silicates are large olivine crystals, often of gem quality. These peridots make the pallasites some of the most attractive meteorites known, and cut and polished pallasite slices are highly coveted among meteorite collectors. Sometimes pallasites and pallasitic peridots are used in jewelry, making them the only genuine cosmic gemstones on Earth.

Based on their origin and formation history, the pallasites are regarded as samples of core/mantle boundary material from differentiated asteroids, inferring that a close relationship exists to the iron meteorites. Upon etching, larger metal portions of polished slices display typical Widmanstätten figures. In addition to this, pallasites display chemical, elemental, and isotopic trends that link them to specific chemical groups of iron meteorites, linking their origin to a common parent body. Hence, they are classified into three distinct groups or grouplets, similar to the chemical groups of the iron meteorites: (1) the main group pallasites, (2) the Eagle Station grouplet, and (3) the pyroxene grouplet.


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FedEx 對包含 2 或更多商品的訂單折扣為 $40.00
DHL $30.00 / :幾天天 $30.00 / :幾天天
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trueblueminerals
trueblueminerals
rare large gemstones and minerals
:城市,國家
已驗證
:總反饋

  • peketrain
    peketrain
    積極的

    Very pleased with the specimen and transaction

  • setillia
    setillia
    中性的

    Responsive seller, which is appreciated. Lovely gem. The only issue was with shipping. I paid for post but it was sent via Fedex. Fedex (of course) charged me illegal fees over a month after delivery! This was why I chose post and not Fedex.

  • bainesrh
    bainesrh
    積極的

    Beautiful gemstone

  • olga22220
    olga22220
    積極的

    Paid and shipped - no feedback left after 100 days

20%
優惠券代碼 BLACKFRIDAY24
有效期至
3rd Dec 2024

審計

Gemstone Sheriff計劃允許我們的會員請求對任何產品進行審核,該審核由獨立的 Gemologist 人員完成,該資格人員評估商品描述和圖片的準確性。

送貨細節

船運:
$30.00 :通過 Standard Shipping - Tracked 計算天數
發貨自:
Australia

付款方式

  • stripe

概述

列表類型 : Standard
產品編號 : 1212038
開始 : 23rd November 2024 09:31 pm PST
* 所有價格均以:貨幣為單位