Name/Title
Black CalciteEntry/Object ID
2004.1.112Description
Chemical Composition: BaSO4
Crystal System: Orthorhombic System
Description: Common Name: Barite
Chemistry: BaSO4
Group: Sulfates
Location: Cavnic, Romania
Description: Blue-ish gray layered rose patterend crystals.
PHYSICAL CHARACTERISTICS:
•Color is variable but is commonly found colorless or white, also blue, green, yellow and red shades.
•Luster is vitreous.
•Transparency crystals are transparent to translucent.
•Crystal System is orthorhombic; 2/m 2/m 2/m
•Crystal Habits include the bladed crystals that are dominated by two large pinacoid faces top and bottom and small prism faces forming a jutting angle on every side. There are many variations of these faces but the flattened blades and tabular crystals are the most common. If the pinacoid faces become diminished or are absent, the resulting prismatic crystal has a rhombic cross section. Also scaly, lamellar, and even fiberous.
•Cleavage is perfect in one direction, less so in another direction.
•Fracture is conchoidal.
•Hardness is 3 - 3.5
•Specific Gravity is approximately 4.5 (heavy for translucent minerals)
•Streak is white.
•Associated Minerals are numerous but significant associations have been with chalcopyrite, calcite, aragonite, sulfur, pyrite, quartz, vanadinite, cerussite and fluorite among many others.
•Other Characteristics: green color in flame test (see above).
•Notable Occurrences include Oklahoma, Connecticut and Colorado, USA; England and Germany.
•Best Field Indicators are crystal habit, flame test and density.
Fracture: conchoidal
Hardness: 3 Calcite
Luster: Vitreous
Rock Type: Sedimentary
Specific Gravity: 4.5
Streak: whiteCollection
Suomynona Mineral Collection, Suomynona CollectionDimensions
Width
8 inDepth
9 inLength
11 inWeight
24.92 ozDimension Notes
Dimension taken at widest pointsLocation
Location
Display Case
FS-9Room
Frieda Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Ian CunninghamDate
December 27, 2023
