Oxide in rubies and sapphires
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AnswerCrossword Clue
ALUMINAOxide in rubies and sapphires
ALUMINAOxide found in rubies and sapphires
CORUNDUMSapphires and rubies.
GEMSEmeralds, rubies, and sapphires
SRILANKANoted source of rubies and sapphires
LIMEOxide used in cement and mortar.
boehmitesA crystalline mineral compound composed of aluminum oxide and hydroxide and found in bauxite
rougered powder consisting essentially of ferric oxide used in polishing glass, metal, or gems and as a pigment
cupritemineral, cuprous oxide, Cu2O, occurring in red crystals and brown to black granular masses: an ore of copper
cupritesmineral, cuprous oxide, Cu2O, occurring in red crystals and brown to black granular masses: an ore of copper
thoriaa powdery white oxide of thorium ThO2 used especially as a catalyst and in crucibles and refractories and optical glass
spodosolA soil of an order rich in aluminum oxide and organic matter, typically characterized by low fertility, and including most podzols
spodosolsA soil of an order rich in aluminum oxide and organic matter, typically characterized by low fertility, and including most podzols
zafferartificial mixture, resembling smalt, containing cobalt oxide and, usually, silica, used to produce a blue color in glass and in ceramic glazes
zaffreartificial mixture, resembling smalt, containing cobalt oxide and, usually, silica, used to produce a blue color in glass and in ceramic glazes
zaffersartificial mixture, resembling smalt, containing cobalt oxide and, usually, silica, used to produce a blue color in glass and in ceramic glazes
zaffresartificial mixture, resembling smalt, containing cobalt oxide and, usually, silica, used to produce a blue color in glass and in ceramic glazes
hematitevery common mineral, iron oxide, Fe2O3, occurring in steel-gray to black crystals and in red earthy masses: the principal ore of iron
smaltscoloring agent made of blue glass produced by fusing silica, potassium carbonate, and cobalt oxide, used in powdered form to add color to vitreous materials
smaltcoloring agent made of blue glass produced by fusing silica, potassium carbonate, and cobalt oxide, used in powdered form to add color to vitreous materials
lithoponewhite pigment consisting of zinc sulfide, barium sulfate, and some zinc oxide, used as a pigment and filler in the manufacture of paints, inks, leather, paper, linoleum, and face powders
thermitemixture of finely-divided metallic aluminum and ferric oxide that when ignited produces extremely high temperatures as the result of the union of the aluminum with the oxygen of the oxide: used in welding, incendiary bombs, etc.
ferriticany of several magnetic substances that consist essentially of ferric oxide combined with the oxides of one or more other metals (as manganese, nickel, or zinc), have high magnetic permeability and high electrical resistivity, and are used especially in electronic devices