Name/Title
CinnabarEntry/Object ID
78.63.201Description
Chemical Composition: Al(OH)3
Crystal System: Hexagonal System
Description: Common Name: Cinnabar
Chemistry: HgS
Group: Sulfides
Location: California
Description: Small white rock specimen with Cinnabar crystals. Colors are white rock with rose colored tiny crystals.
Physical Charateristics:
Color is a bright scarlet or cinnamon red to a brick red.
•Luster is adamantine to submetallic in darker specimens.
•Transparency crystals are translucent to transparent.
•Crystal System is trigonal; 32
•Crystal Habits: individual, well formed, large crystals are scarce; crusts and crystal complexes are more common; may be massive, or in capilary needles. Crystals that are found tend to be the six sided trigonal scalahedrons that appear to have opposing three sided pyramids. It also forms modified rhombohedrons, prismatic and twinned crystals as discribed above.
•Cleavage is perfect in three directions, forming prisms.
•Fracture is uneven to splintery.
•Hardness is 2 - 2.5.
•Specific Gravity is approximately 8.1+ (very heavy for a non-metallic mineral)
•Streak is red
•Associated Minerals are realgar, pyrite, dolomite, quartz, stibnite and mercury.
•Other Characteristics: silghtly sectile and crystals can be striated.
•Notable Occurances include Almaden, Spain; Idria, Serbia; Hunan Prov., China and California, Oregon, Texas, and Arkansas, USA.
•Best Field Indicators are crystal habit, density, cleavage, softness and color.
Hardness: 7 Quartz
Rock Type: SedimentaryCollection
Delmar Smith Mineral CollectionAcquisition
Accession
78.63Source or Donor
Delmar Smith Crystal CollectionAcquisition Method
DonationDimensions
Width
1-1/4 inDepth
1 inLength
1-3/4 inLocation
Location
Shelf
CS-I-3Room
Curation StorageBuilding
Crater Rock MuseumDate
January 31, 2024Location
Wall
NorthBuilding
Storage (old gift shop upstairs)Category
PermanentMoved By
Rawley WyattDate
September 2, 2014Location
Cabinet
G-1 rearWall
NorthBuilding
Storage (old gift shop upstairs)Category
Permanent
