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hyacinths & Vivian
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furman >:( - labradorite
" Labradorite ((Ca, Na)(Al, Si)4O8) is a calcium-enriched feldspar mineral first identified in Labrador, Canada, which can display an iridescent effect (schiller). "
mohs scale hardness - 6-6.5
May - anyolite
" Although anyolite is advertised as a variety of the mineral zoisite, anyolite is actually a metamorphic rock composed of intergrown green zoisite, black/dark green pargasite (erroneously identified as tschermakite), and ruby. "
mohs scale hardness - 6-7
Denice - benitoite
" Benitoite is a rare blue barium titanium cyclosilicate, found in hydrothermally altered serpentinite. It forms in low temperature, high pressure environments typical of subduction zones at convergent plate boundaries. "
mohs scale hardness - 6-6.5
Raymond - neptunite
" Neptunite is a silicate mineral with the formula KNa2Li(Fe2+, Mn2+)2Ti2Si8O24. With increasing manganese it forms a series with mangan-neptunite. Watatsumiite is the variety with vanadium replacing the titanium in the formula. "
mohs scale hardness - 5-6
Sam - grape agate
" Grape Agate is a market name for purple aggregates of tiny quartz crystals with botryoidal (spherical) habit. Mineralogically speaking, grape agate is not an agate and is actually botryoidal purple chalcedony. "
mohs scale hardness - 7
Riuri - ammonite
" Ammonites are excellent index fossils, and linking the rock layer in which a particular species or genus is found to specific geologic time periods is often possible. Their fossil shells usually take the form of planispirals. "