Name/Title
GraphiteEntry/Object ID
2014.1.10Description
Chemical Composition: Al(OH)3
Crystal System: Hexagonal System
Description: Common Name: Graphite
Chemistry: Element C
Group: Native Elements
Location: Unknown
Description: This is a rough specimen with irregular shape and a metallic silver color.
Physical Charateristics:
•Color is black silver.
•Luster is metallic to dull.
•Transparency crystals are opaque
•Crystal System is hexagonal; 6/m 2/m 2/m
•Crystal Habits include massive lamellar veins and earthy masses. also as scaly granules in metamorphic rocks.
•Hardness is 1 - 2
•Specific Gravity is 2.2 (well below average)
•Cleavage is perfect in one direction.
•Fracture is flaky.
•Streak is black gray to brownish gray.
•Associated Minerals include quartz, calcite, micas, iron meteorites and tourmalines.
•Other Characteristics: thin flakes are flexible but inelastic, mineral can leave black marks on hands and paper, weakly conducts electricity.
•Notable Occurrences include New York and Texas, USA; Russia; Mexico; Greenland and India.
•Best Field Indicator is softness, luster, density and streak.
- See more at: http://www.galleries.com/graphite#sthash.p36EggQJ.dpuf
Hardness: 7 Quartz
Rock Type: SedimentaryCollection
RAGM Mineral CollectionAcquisition
Accession
2014.1Source or Donor
Crater Rock Museum (unknown donors)Acquisition Method
GiftDimensions
Height
2-1/4 inWidth
7/8 inLength
2-1/4 inLocation
Location
Display Case
FS-5Room
Frieda Smith HallBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Ian C.Date
January 29, 2025Notes
Major mineral groups installationLocation
Shelf
CS-I-2Room
Curation StorageBuilding
Crater Rock MuseumDate
January 31, 2024
