Name/Title
DanburiteEntry/Object ID
2013.1.27Description
Chemical Composition: SiO2
Crystal System: Triclinic System
Description: Common Name: Danburite
Chemistry: CaB2(SiO4)2
Group: Silicates
Location: Charcas, Charcas Municipality, San Luis Potosí, Mexico
Description: This specimen is a cluster of large crystals with a scaly texture. There are also groupings of smaller, more transparent crystals. The color is white .
Physical Charateristics:
•Color is almost always clear or white, but also can be shades of yellow, pink and brown.
•Luster is vitreous.
•Transparency: Crystals are transparent to translucent.
•Crystal System is orthorhombic; 2/m 2/m 2/m
•Crystal Habits include generally prismatic crystals with a diamond-shaped cross-section. The termination is a steeply slanted dome producing a wedge look. Crystals can be rather thin to almost acicular or up to a foot long and several inches across.
•Cleavage is poor in one direction, basal.
•Fracture is uneven to conchoidal.
•Hardness is 7 - 7.5
•Specific Gravity is approximately 3.0 (average)
•Streak is white or colorless.
•Associated Minerals are quartz, feldspars, cassiterite, dolomite, corundum variety ruby, and fluorite.
•Notable Occurrences include Danbury, Connecticut and Russell, New York, USA; Charcas, San Luis Potosi, Mexico; Kyushu Is., Japan; Mogok, Burma and Uri, Switzerland.
•Best Field Indicators are crystal habit, poor cleavage, hardness and associations.
Fracture: Conchoidal
Hardness: 8 Topaz
Luster: Glassy
Rock Type: Sedimentary
Specific Gravity: 2.68-2.72
Streak: WhiteCollection
RAGM Mineral CollectionDimensions
Width
8-1/2 inDepth
9-1/4 inLength
10-1/2 inLocation
Location
Display Case
FS-3Room
Frieda Smith HallBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Ian C.Date
January 29, 2025Notes
Major mineral groups installationLocation
Display Case
FS-4Room
Frieda Smith HallBuilding
Crater Rock MuseumCategory
PermanentDate
August 18, 2023
