satin spar การใช้

Satin spar is almost always prismatic and fibrous in a parallel crystal habit.
Selenite may also occur in a silky, fibrous form, in which case it is commonly called " satin spar ".
Satin spar often occurs in seams, some of them quite long, and is often attached to a matrix or base rock.
Featuring a peek at Niagara Falls, petite souvenir barrels were produced as fob charms by the thousands, in feldspar and satin spar.
In the sedimentary rocks, gypsum is commonly found at Blomidon, Clarke Head, and near Windsor in both the colorless variety ( selenite ) and the fibrous variety ( satin spar ), the latter sometimes being bright orange.