PRESENTATION OUTLINE
Olmite is only found in Kalahar: Manganese field of South Africa. Olmite is named after the filipoo olmi, an Italian mineralogist from Florence, Italy.
Olmite's color is pale yellow, tan, orange-brown, orange, peach, pink, light red, grayish pink, or light gray. Olmite's streak is white. Olmite's hardness is 5-5.5. Olmite's chemical formula is CaMn{SiO3(Oh)}(Oh. Olmite's density is 3.05
Olmite's composition is basic calcium manganese silicate. Olmite's crystal system is orthorhombic. Olmite's transparency is transparent to nearly opaque. Olmite's specific gravity is 3.0-3.1. Olmite's luster is vitreous,pearly.
Olmite has no cleavage. Olmite fracture is uneven.
Olmite's tenacity is brittle. Other I.D. marks of Olmite is fluorescent red in shortwave anltraviolt light. Striking features of Olmite is its color, crystal habits, and locality. Olmite's environment is in manganese-rich hydrothermal replacement deposits. Rock type of Olmite is metamorphic.
Nickeline is named for its nickel composition of being one the primary nickel minerals. Density of Nickeline is 7.78-7.8. Nickeline's color is bronze to copper-red, or tarnishes gray to dark gray. Nickeline's streak is dark brown to black.
Nickeline's hardness is 5-5.5. Nickeline's chemical formula is NiAs. Nickeline's composition is nickel arsenate, often with some antimony. Nickeline's crystal system is hexagonal. Nickeline's specific gravity is 7.8. Nickeline's luster is metallic.
Nickeline has no cleavage. Nickeline's fracture is conchoidol to uneven. Nickeline's striking features is the color and mode of occurrence. Nickeline's environment is the mesothermal ore veins. Nickeline's rock type is sedimentary and metamorphic.
Thorite is named for its content of the rare element thorium. Thorite's density is 4-5.7 or 5.35. Thorite's color is black, reddish-brown, brown, orange,orange yellow, or green. Thorite's streak is light brown.
Thorite's chemical formula is ThSiO4. Thorite's hardness is 4.5-5. Thorite's crystal system is tetragonal Thorite's transparency is opaque and rarely transparent. Thorite's specific gravity is 4.0-6.7. Thorite's luster is resinous to pitchy. Thorite's cleavage is 3.2.
Thorite's tenacity is brittle. Thorite's striking features is high specific gravity, luster, and strong radioctivity. Thorite's environment is in rare earth granitie pegmatites and pyroclastic volcanic deposits.
Silver is one of the most famous precious metals. Silver's density is 10.5. Silver's color is silver-white onutamished surfaces, tarnishes dark yellow to black. Silver's streak is silver-white to light gray. Silver's hardness is 2.5-3.
Silver's chemical formula is Ag. Silver's composition is silver, sometimes mixed with gold, mercury, arsenic and antimony. Silver's crystal system is isonmertic. Silver's transparency is opaque. Silver's specific gravity is 9.6-12.0.
Silver's Luster is metallic. Silver has no cleavege. Silver's tenacity is ductile and malleable. Silver's striking features is interesting crystal habit, tarnish, ductility, and conductivity. Silver's rock type is igneous and metamorphic.
