Minerals used as gems
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AnswerCrossword Clue
SPINELSMinerals used as gems
semipreciousDenoting minerals that can be used as gems but are considered to be less valuable than precious stones
lapisstone (used in Latin names for minerals, gems, etc.)
lapidesstone (used in Latin names for minerals, gems, etc.)
IOLITESBlue silicates used as gems.
spinellemineral of this group, essentially magnesium aluminate, MgAl2O4, some varieties being used as gems
spinelmineral of this group, essentially magnesium aluminate, MgAl2O4, some varieties being used as gems
spodumenemineral, lithium aluminum silicate, LiAlSi2O6, occurring in prismatic crystals, transparent varieties being used as gems
rougered powder consisting essentially of ferric oxide used in polishing glass, metal, or gems and as a pigment
corundumcommon mineral, aluminum oxide, Al2O3, notable for its hardness: transparent varieties, as sapphire and ruby, are used as gems, other varieties as abrasives: often made synthetically
corundumscommon mineral, aluminum oxide, Al2O3, notable for its hardness: transparent varieties, as sapphire and ruby, are used as gems, other varieties as abrasives: often made synthetically
tantaluma gray-white ductile acid-resisting metallic element found combined in rare minerals (as tantalite and columbite) and used especially in electronic components see element table
vermiculiteA yellow or brown mineral found as an alteration product of mica and other minerals, and used for insulation or as a moisture-retentive medium for growing plants
zeoliticany of a group of hydrated silicates of aluminum with alkali metals, commonly occurring as secondary minerals in cavities in basic volcanic rocks: used for their molecular sieve properties because they undergo dehydration with little or no change in cryst
zeoliteany of a group of hydrated silicates of aluminum with alkali metals, commonly occurring as secondary minerals in cavities in basic volcanic rocks: used for their molecular sieve properties because they undergo dehydration with little or no change in cryst
zeolitesany of a group of hydrated silicates of aluminum with alkali metals, commonly occurring as secondary minerals in cavities in basic volcanic rocks: used for their molecular sieve properties because they undergo dehydration with little or no change in cryst
boraxa white crystalline compound that consists of a hydrated sodium borate Na2B4O7À10H2O, that occurs as a mineral or is prepared from other minerals, and that is used especially as a flux, cleansing agent, and water softener, as a preservative, and as a fireproofing agent
vanadiumrare element occurring in certain minerals and obtained as a light-gray powder with a silvery luster or as a ductile metal: used as an ingredient of steel to toughen it and increase its shock resistance. Symbol: V; at. wt.: 50.942; at. no