Thulite




Thulite, which is composed of Calcium Aluminum Silicate Hysdroxide, is a pink form of zoisite that is sometimes referred to as "Rosaline". It is found in a number of localities, including Lom in Norway, the Austrian Tyrol, Western Australia, and North Carolina and Washington State, USA. It is an opaque, massive, mineral with a vitreous to pearly luster that exhibits a perfect cleavage. Its soft pink color is due to trace quantities of manganese — this give it an attractive look which has made it popular for ornamental use in the jewelry trade as well as for carvings.

Chemical Composition:
Calcium Aluminum Silicate Hydroxide
Ca2Al3(SiO4)(Si2O7)O(OH)
Color:
Pale Pink
Hardness:
6.5
Specific Gravity:
3.10 - 3.38
Cleavage:
Perfect
Fracture:
Uneven to conchoidal
Crystal Structure:
Opaque; orthorhombic
Luster:
Vitreous to pearly
Streak:
White or colorless
Occurence:
Norway, Austria, USA and Australia