Name/Title
JasperEntry/Object ID
78.59.185Description
Chemical Composition: SiO2
Crystal System: Hexagonal System
Description: Common Name: Green Jasper
Chemistry: SiO2 , Silicon dioxide
Class: Silicates
Location: Warner Valley Antelope Refuge,Oregon
Description: A large chunk of "Morrisonite" (Jasper) also known as "Prase". Found in the Antelope refuge of the Warner Valley in eastern Oregon. Colors" This piece is various shades of olive green found in swirling "Opalized" patterns. The rock is broken in many areas along its' cleavage resembling "craters". The bottom side of piece is covered with a thick cream and brown material.
PHYSICAL CHARACTERISTICS:
The Gemstone Jasper :
Jasper is an opaque variety of Chalcedony, and is usually associated with brown, yellow, or reddish colors, but may be used to describe other opaque colors of Chalcedony such as dark or mottled green, orange, and black. Jasper is almost always multicolored, with unique color patterns and habits.
Chemical Formula SiO2
Color White, Blue, Red, Green, Yellow, Orange, Brown, Gray, Black, Banded, Multicolored
Hardness 6.5 - 7
Crystal System Hexagonal
Refractive Index 1.54 - 1.55
SG 2.63 - 2.65
Transparency Opaque
Double Refraction .009
Luster Vitreous
Cleavage Indiscernible
Mineral Class Quartz (Chalcedony). See also the Jasper mineral page.
Jasper ON EBAY
- See more at: http://www.minerals.net/gemstone/jasper_gemstone.aspx#sthash.iy3rb5Ly.dpuf
Hardness: 7 Quartz
Luster: Vitreous
Rock Type: Sedimentary
Specific Gravity: 2.65
Variety: The name means "spotted or speckled stone", and is derived via Old French jaspre (variant of Anglo-Norman jaspe) and Latin iaspidem (nom. iaspis)) from Greek ?asp?? iaspis, (feminine noun)[5] from a Semitic language (cf. Hebrew ????? yushphah, Akkadian yashupu).[6]
Green jasper was used to make bow drills in Mehrgarh between 4th and 5th millennium BC.[7] Jasper is known to have been a favorite gem in the ancient world; its name can be traced back in Arabic, Persian, Hebrew, Assyrian, Greek and Latin.[8] On Minoan Crete, jasper was carved to produce seals circa 1800 BC, as evidenced by archaeological recoveries at the palace of Knossos.[9]
Although the term jasper is now restricted to opaque quartz, the ancient iaspis was a stone of considerable translucency. The jasper of antiquity was in many cases distinctly green, for it is often compared to the emerald and other green objects. Jasper is referred to in the Niebelungenlied as being clear and green. Probably the jasper of the ancients included stones which would now be classed as chalcedony, and the emerald-like jasper may have been akin to the modern chrysoprase. The Hebrew word yushphah may have designated a green jasper.[10] Flinders Petrie suggested that the odem, the first stone on the High Priest's breastplate, was a er Valley Antelope Refugered jasper, whilst tarshish, the tenth stone, may have been a yellow jasper.Collection
Delmar Smith Mineral CollectionOther Names and Numbers
Other Number
Other Number: 2009.62.281Dimensions
Width
7 inDepth
5 inLength
10-1/2 inLocation
Location
Shelf
CS-E-6Room
Curation StorageBuilding
Crater Rock MuseumCategory
PermanentMoved By
Jillian Mather KettleyDate
February 21, 2024
