Name/Title
Coyamito AgateEntry/Object ID
1986.62.53Description
Chemical Composition: SiO2
Crystal System: Orthorhombic System
Description: Common Name: Quartz var. agate (laguna)
Chemistry: SiO2
Group: Silicates
Location: Chihuahua, Mexico
Description: Rough, rounded back with convex polished face. Outer areas are banded light and dark gray. The inner area is dull yellow with pinkish red.
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
2-3/4 inDepth
2-1/8 inLength
3-1/2 inDimension Notes
Dimension taken at widest pointsLocation
Location
Container
Center.Drawer
Top ShelfShelf
Right, RightWall
WestBuilding
Frieda Smith HallCategory
PermanentMoved By
Steve MillerDate
August 24, 2011Location
Shelf
LeftCabinet
Case # 51Room
Delmar Smith HallBuilding
Crater Rock MuseumCategory
Permanent