Name/Title
Chevron AmethystEntry/Object ID
1986.62.28Description
Chemical Composition: SiO2
Crystal System: Orthorhombic System
Description: Common Name: Quartz var. amethyst
Chemistry: SiO2
Group: Silicates
Location: Rio Grande do Sul, Brazil
Description: Thick slab with polished face. Angular bands of purple and white to gray.
PHYSICAL CHARACTERISTICS:
Agate ( /'æg?t/) is a microcrystalline variety of silica, chiefly chalcedony, characterised by its fineness of grain and brightness of color. Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks.
Fracture: conchoidal
Hardness: 7 Quartz
Luster: Waxy
Rock Type: Sedimentary
Specific Gravity: 2.58-2.64
Streak: white
Texture: MircocrystallineCollection
Mexican Agate CollectionAcquisition
Accession
78.59Source or Donor
Delmar Smith Agate CollectionAcquisition Method
GiftDimensions
Width
4-7/8 inDepth
1/2 inLength
8-1/2 inDimension Notes
Dimension taken at widest pointsLocation
Location
Display Case
DS-10Room
Delmar Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Curtis GardnerDate
May 10, 2023Notes
Added current location while cleaning shelf
