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.
• When cut across the fibers and polished on the ends, satin spar exhibits an optical illusion when placed on a printed or pictured surface; and is often called and sold as the  television stone ( as is ulexite ).
• Selenite crystals that exhibit in either reticular or acicular habits, satin spar, in general ( as fibrous crystals are thin and narrow ), desert roses that are thinly bladed, and gypsum flowers, particularly acicular gypsum flowers, can be quite brittle and easily broken.