CRISTOBALITE

noun

16 Scrabble

19 WWF

C 3

R 1

I 1

S 1

T 1

O 1

B 3

A 1

L 1

I 1

T 1

E 1

Definition

A mineral of volcanic rocks that solidified at a high temperature. Cristobalite is chemically identical to quartz, with the chemical formula SiO2, but has a different crystal structure. Crystals are always microscopic, and usually form small rounded masses.