Samarskite Value, Price, and Jewelry Information


samarskite - Norway
“Samarskite – Y,” Setesdal, Aust-Agder County, Norway. © Rob Lavinsky, www.iRocks.com. Used with permission.

Samarskite is a very heavy material from which lustrous black to brownish cabochons are sometimes cut as curiosities. The material is rather brittle and is not intended for wear. It is rarely seen or displayed since black stones are not terribly attractive. Sometimes a stone is faceted in the nature of jet or marcasite.

Samarskite Value

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Samarskite Information

DataValue
NameSamarskite
Crystallography Monoclinic. Crystals rough, tabular: massive, compact.
Refractive Index 2.20
Colors Velvety black, yellowish brown on exterior.
Luster Dull after alteration; resinous; vitreous, submetallic.
Fracture Conchoidal
Hardness 5-6
Specific Gravity 5.25-5.69 (variable), usually near upper end of range.
Cleavage Indistinct
Stone SizesLarge cabochons can be cut from masses found at various localities. This material is essentially opaque.
Luminescence None.
Transparency Opaque.
Formula(Y, Ce, U, Ca, Pb)(Nb,Ta,Ti,Sn)2O6
Pleochroism None.
Optics Isotropic; N = 2.20 (variable). Isotropic nature caused by metamictization.

SAMARSKITE See also: Euxenite, Fergusonite.

Samarskite Information

Streak: Black to reddish brown.

Optics: Isotropic; N = 2.20 (variable).

Isotropic nature caused by metamictization.

Occurrence: A widespread pegmatite mineral.

North Carolina; Colorado.

USSR; Norway; Madagascar; Zaire; Japan; Minas Gerais, Brazil; Madras. India.

Comments: Samarskite is a very heavy material from which lustrous black to brownish cabochons are sometimes cut as curiosities. The material is rather brittle and is not intended for wear. It is rarely seen or displayed since black stones are not terribly attractive. Sometimes a stone is faceted in the nature of jet or marcasite.

Name: ln honor of Colonel Samarski, a Russian mining official.