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164.80 CTS Natural Rhodochrosite Argentina Gem grade TBM-1715

3450
3

SKU
Dimensiones (mm)
80.000 x 35.000 x 4.000mm
Peso (cts)
164.800
Treatment
No Treatment
Colores

RHODHOCROSITE

Origin Argentina

free form cabs
highly polished
Natural Rhodochrosite

Beautiful watermelon - Color
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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Resto del mundo
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trueblueminerals
trueblueminerals
rare large gemstones and minerals
Mermaid Beach , Australia
Verificado
809 de comentarios

  • peketrain
    peketrain
    Positivo

    Very pleased with the specimen and transaction

  • scsamler
    scsamler
    Positivo

    This stone made me fall in love with Padparadsha sapphire. Truly wonderful!

  • setillia
    setillia
    Neutral

    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
    Positivo

    Beautiful gemstone

20%
Código promocional Gift
Válido hasta
31st Dec 2024

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Detalles de envío

Envío:
$30.00 14 días a través de Standard Shipping - Tracked
Se envía desde:
Australia

Opciones de pago

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Descripción general

Tipo de listado : Standard
ID del Producto : 904832
Empieza : 20th December 2024 06:15 pm PST
* Todos los precios están en USD