any mineral of a group of dark coloured rock forming silicates

any mineral of a group of dark coloured rock forming silicates
Crossword Clue
**We have found 6 answers to crossword clue "any mineral of a group of dark coloured rock forming silicates"**
**The Best Answer: 10/10**
Answer	Crossword Clue
amphibole	any mineral of a group of dark-coloured, rock-forming silicates
amphiboles	AMPHIBOLE, any mineral of a group of dark-coloured, rock-forming silicates
graywacke	any coarse-grained, usually dark sandstone containing angular mineral and rock fragments in a fine-grained clayey matrix also GREYWACKE, WACKE

greywacke	any coarse-grained, usually dark sandstone containing angular mineral and rock fragments in a fine-grained clayey matrix also GRAYWACKE, WACKE
greywackes	GREYWACKE, any coarse-grained, usually dark sandstone containing angular mineral and rock fragments in a fine-grained clayey matrix also GRAYWACKE, WACKE
graywackes	GRAYWACKE, any coarse-grained, usually dark sandstone containing angular mineral and rock fragments in a fine-grained clayey matrix also GREYWACKE, WACKE

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.

any mineral of a group of dark coloured rock forming silicatesCrossword Clue