Variety/Type Of: Phosphate
Color: Sky blue (the most desirable as a gemstone), blue, bluish green, green, yellowish green; often with brown, gray, or black matrix, as spider-webbing or background color.
Streak: Bluish white to greenish white
Luster: Waxy to subvitreous. Dull or chalky when weathered.
Cleavage: Perfect, but rarely seen because of the small grain size of most specimens
Hardness: 5 to 6 (often lower because of porosity or exposure to weathering)