Rhodonite

Object/Artifact

-

Crater Rock Museum

Name/Title

Rhodonite

Entry/Object ID

2009.62.290

Description

Description: Common Name: Rhodonite Chemistry: (Mn, Fe, Mg, Ca)5(SiO3)5 , Manganese Iron Magnesium Calcium Silicate. Class: Silicates Location: Unknown Description: Large, thin slab with polished face. Light, medium, to dark pink in an irregular (somewhat symmetrical) formation, with some green spotted areas intermixed. PHYSICAL CHARACTERISTICS: Color is typically pink to red or orange and even black. Luster is vitreous to dull to pearly on polished surfaces. Transparency: Crystals are generally translucent and rarely transparent. Crystal System is triclinic; bar 1 Crystal Habits include crystals that have a blocky prismatic habit, however crystals are rare. More typically massive, coarse and fine granular aggregates. Cleavage is perfect in two directions forming prisms with a rectangular cross-section. Fracture is conchoidal. Hardness is 5.5 - 6.5. Specific Gravity is approximately 3.4 - 3.7+ (above average for translucent minerals) Streak is white. Associated Minerals are calcite, pyrite, microcline, spessartine, pyroxmangite and other manganese minerals. Other Characteristics: May tarnish to a brown or black color upon exposure. Best Field Indicators are color, black inclusions, lack of reaction to acid and hardness.

Collection

RAGM Mineral Collection

Acquisition

Accession

2009.62

Source or Donor

Museum Collection of Minerals

Acquisition Method

Donation

Dimensions

Width

9 in

Depth

1/2 in

Length

12-1/2 in

Location

Location

Shelf

CS-H-3

Room

Curation Storage

Building

Crater Rock Museum

Category

Permanent

Moved By

Jillian Mather Kettley

Date

February 7, 2024