Samarskite Value, Price, and Jewelry Information

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

Samarskite

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 Information

Data Value
Name Samarskite
Colors Velvety black, yellowish brown on exterior.
Crystallography Monoclinic. Crystals rough, tabular: massive, compact.
Refractive Index 2.20
Luster Dull after alteration; resinous; vitreous, submetallic.
Hardness 5-6
Fracture Conchoidal
Specific Gravity 5.25-5.69 (variable), usually near upper end of range.
Cleavage Indistinct
Stone Sizes Large cabochons can be cut from masses found at various localities. This material is essentially opaque.
Luminescence None.
Luminescence Present No
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.