M.E. O�Neil�s [Buckhorn] claim, Bull Pen Canyon, and at the Burro and Deremo-Snyder mines, Slick Rock district, San Miguel Co., Colorado Link to MinDat.org Location Data.
Name Origin:
Named for Clarence Samuel Ross (1880-1975), American geologist and mineralogist, U.S. Geological Survey, Washington, D.C., USA.
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Physical Properties of Rossite
Cleavage:
{???} Good
Color:
Yellow.
Density:
2.45
Diaphaneity:
Transparent
Hardness:
2-3 - Gypsum-Calcite
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Pearly
Optical Properties of Rossite
Gladstone-Dale:
CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3196,KPDmeas= 0.3156,KC= 0.3165 Ncalc = 1.77 - 1.78
Chemical Formula: 
