Jasper
From The Gemology Project
Jasper | |
---|---|
Chemical composition | SiO2 Silicon dioxide |
Crystal system | Trigonal |
Habit | Aggregate, massive |
Fracture | Conchoidal |
Hardness | 6.5-7 |
Refractive index | 1.53-1.54 |
Specific gravity | 2.58-2.64 |
Lustre | Vitreous |
Scenic jasper
Picture, or scenic, or landscape jasper and agate gets its name from the pictures of scenes, animals or objects formed by the colorful patterns from other minerals present.