Welcome to the Rock & Mineral Identification Database!
Please go to the help page for descriptions of these items if you are new to this.

Rock Name:   

Streak Color: 

Rock Color:    

Crystal Shape:

Specific Gravity:
Minimum:        
Maximum:       
(Values may be up to two decimals)

Moh's Hardness:
Minimum:         
Maximum:        

Transparency:
Translucent
Translucent in thin splinters
Opaque
Transparent
Transparent to Opaque
Dull

Fracture:
Uneven
Smooth
Fibrous
Dendritic
Hook-Shaped
Splintery
Brittle

Cleavage:
Perfect
Good
Incomplete
Indistinct
None

Luster:
Perfect
Metallic(splendent)
Submetallic
Vitreous(glassy)
Adamantine(brillant or diamond like)
Resinous(Resin like i.e. dried glue)
Silky
Pearly(mother-of-pearl)
Greasy(Oily)
Pitchy (look of tar)
Waxy
Dull(Earthy)