Mineral made of silica
Crossword Clue

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AnswerCrossword Clue
OPALMineral made of silica
OPALSilica mineral
OPALSilica-based mineral
OPALMineral formed from silica
OPALStone made of hydrated silica
borosilicateA low-melting-point glass made from a mixture of silica and boric oxide (B2O3)
borosilicatesA low-melting-point glass made from a mixture of silica and boric oxide (B2O3)
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