Carrollite in Calcite

Object/Artifact

-

Crater Rock Museum

Name/Title

Carrollite in Calcite

Entry/Object ID

2004.1.29

Description

Assemblage Zone: pegmatite dikes Chemical Composition: CuCo2S4 / CaCO3 Crystal System: Hexagonal System Description: Common Name: Carrollite in Calcite Group Name: Linnaeite / Carbonate Chemistry: Cu(Co, Ni)2S4 / CaCO3 Location: Kamoya, South Congo Description: Slightly sparkly white base with super shiny metallic crystals. PHYSICAL CHARACTERISTICS: for Carrollite Lustre: Metallic Diaphaneity (Transparency): Opaque Colour: Light Grey to Steel Grey Comment: Tarnishes to copper red or violet grey Hardness (Mohs): 4½ - 5½ Hardness (Vickers): VHN100=507 - 586 kg/mm2 Cleavage: Imperfect/Fair Imperfect on {001} Fracture: Irregular/Uneven, Sub-Conchoidal Density (measured): 4.5 - 4.8 g/cm3 Density (calculated): 4.83 g/cm3 Fracture: conchoidal Hardness: 4 Flourite Luster: Metallic Occurrence: In hydrothermal vein deposits Specific Gravity: 4.4-4.8 Streak: grey

Collection

Suomynona Mineral Collection, Suomynona Collection

Acquisition

Accession

2004.1

Source or Donor

Suomynona Mineral Collection

Acquisition Method

Donation

Dimensions

Width

3 in

Depth

2-1/2 in

Length

4-1/2 in

Weight

1.38 oz

Dimension Notes

Dimension taken at widest points

Location

Location

Display Case

FS-16

Room

Frieda Smith Hall

Building

Crater Rock Museum

Category

Permanent

Moved By

Curtis Gardner

Date

May 25, 2023

Notes

Added current location