Sphaleriitti 7,8mm kuvallisella aitoustodistuksella
Sphaleriitti / sphalerite
Mukana kuvallinen aitoustodistus
Alkuperä (todennäköinen) : Espanja
Paino ( ct noin ) : 2,5
Mitat ( mm noin ) : 7,8 x 7,8 x 5,2
Puhtaus :SI
Erinomainen Erittäin hyvä Hyvä ”kakkosluokkaa”
Hionta X
Loisto X
Väri X
Ominaista : monisävyinen sphaleriitti, keltainen - oranssi - ruskea
hakusanoja:sphaleriitti,spaleriiti,keltainen,oranssi,espanja
Common as an important ore of zinc, gem quality sphalerite is a rare collector stone. The mineral is usually nearly black in color but is occaisionally found in transparent pieces of an orange or yellowish brown hue. Clean pieces are extremely rare. |
Known Facts | |
Color Key: | Orange, yellow, brown, green |
Refractive Index:: | 2.37 |
Chemical Composition: | ZnS |
Hardness: | 3.5-4 |
Density: | 4.05 |
Crystal Group: | Cubic |
Ocurrence: | Spain, Mexico |
With a dispersion three times higher than diamond, gem sphalerite is one of the brightest and most dispersive of all minerals. It has a hardness of 3.5 - 4 as well as 6 directions of perfect cleavage. Spahlerite is very difficult to polish and is too soft to be used in jewelry. |