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7.5 Cts-Rhodhochrosite Cabochone (2 PCS) TBG-4212 truebluegems

548
2

存货单位
TBG-4212
尺寸(毫米)
9.000 x 9.000 x 4.000mm
重量 (cts)
7.500
Treatment
No Treatment
Shape
Round
类型
Cabochon
颜色

TRADING AS LIGHTNINGOPALS LLC-TRUEBLUEOPALS AND GEMS

RHODHOCROSITE

Origin Argentina

2 PCS
POLISHED

Beautiful PINK COLOUR
Treatment-NONE

Diaphaneity, Transparent to translucent. Specific gravity, 3.7. Optical properties, Uniaxial (-). Refractive index, nω = 1.814 - 1.816 nε = 1.596 - 1.598. Birefringence, δ = 0.218. Pleochroism, weak. Ultraviolet fluorescence, None. References. Rhodochrosite is a manganese carbonate mineral with chemical composition MnCO3.

Crystal system‎: ‎Trigonal

Mohs scale hardness‎: ‎3.5-4

Crystal class‎: ‎Hexagonal scalenohedral (3m); ...

Optical properties‎: ‎Uniaxial (-)

Rhodochrosite is a manganese carbonate mineral with chemical composition MnCO3. In its (rare) pure form, it is typically a rose-red color, but impure specimens can be shades of pink to pale brown. It streaks white, and its Mohs hardness varies between 3.5 and 4. Its specific gravity is between 3.5 and 3.7. It crystallizes in the trigonal system, and cleaves with rhombohedral carbonate cleavage in three directions. Crystal twinning often is present. It is transparent to translucent with refractive indices of =1.814 to 1.816, =1.596 to 1.598. It is often confused with the manganese silicate, rhodonite, but is distinctly softer.

Rhodochrosite forms a complete solid solution series with iron carbonate (siderite). Calcium, (as well as magnesium and zinc, to a limited extent) frequently substitutes for manganese in the structure, leading to lighter shades of red and pink, depending on the degree of substitution. It is for this reason that the most common color encountered is pink.

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truebluegems
truebluegems
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  • bonusbloke
    bonusbloke
    积极的

    Small but perfectly formed! Arrived very quickly thanks.

  • jtgems
    jtgems
    积极的

    Very nice very tiny

  • sandyatayrshire2
    sandyatayrshire2
    积极的

    Paid and shipped - no feedback left after 100 days

  • sandyatayrshire2
    sandyatayrshire2
    积极的

    Paid and shipped - no feedback left after 100 days

  • ian2508
    ian2508
    积极的

    Paid and shipped - no feedback left after 100 days

40%
优惠券代码 Gift
有效期至
31st Dec 2024

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发货自:
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概述

列表类型 : Standard
产品编号 : 2442037
开始 : 10th December 2024 05:27 pm PST
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