RHODONITE[GEM]

Listing description

Rhodonite is a pink manganese silicate of variable composition that often contains significant amounts of iron, magnesium, and calcium. It has a generalized chemical composition of (Mn,Fe,Mg,Ca)SiO3. Rhodonite is often associated with black manganese oxides which may occur as dendrites, fracture-fillings, or matrix within the specimen. Other names for rhodonite include: manganese spar, manganolite, and rhodarsenide.

Detailed description

Rhodonite is usually found in metamorphic rocks associated with other manganese minerals. It is also found in rocks that have been altered by contact metamorphism, hydrothermal and metasomatic processes. It is usually massive to granular in occurrence. Rarely, it is found as red triclinic crystals. 

Rhodonite is an uncommon mineral. It is found in a few small deposits across the world. Sources of rhodonite include: Russia, Canada, Australia, Brazil, Sweden, Peru, and England. In the United States it has been found in North Carolina, Colorado, New Jersey, and has been named as the state gem of Massachusetts.



Physical Properties

 

Rhodonite's diagnostic properties are its pink to red color, hardness, high specific gravity, perfect cleavage, and its close association with black manganese oxides. It is sometimes confused with rhodochrosite, which is softer and effervescent in hydrochloric acid, or thulite, which is usually not associated with black manganese oxides. The physical properties of rhodonite are summarized in the table below. 

Physical Properties of Rhodonite
Chemical Classification
silicate
Color
pink, red, reddish-brown to brown when weathered
Streak
white
Luster
pearly to vitreous
Diaphaneity
transparent to translucent
Cleavage
perfect, two directions, 90 degrees
Mohs Hardness
5.5 to 6.5
Specific Gravity
3.5 to 3.7
Diagnostic Properties
pink color, cleavage, specific gravity, frequent association with black manganese oxide
Chemical Composition
(Mn2+,Fe2+,Mg,Ca)SiO3
Crystal System
triclinic
Uses
decorative stone, gemstones



Uses of Rhodonite

Rhodonite was once used as ore of manganese in India. Today its only uses are as lapidary materials and as mineral specimens. High-quality crystals of rhodonite can sell for very high prices. Good massive pink- to red-colored material is used as an ornamental stone or gem rough. It is typically used to make cabochons, beads, small sculptures, tumbled stones, and other lapidary projects. 

PRICE
$13.2/KG OR $6/IB
For more information:

mobile: +2348039721941

contact person: emeaba uche

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website: www.franchiseminerals.com

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