Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low grade regional metamorphism.
Aautumn Slate
California Gold Slate
Copper
Green Slate
Multicolor Peacock
Rich
Onyx: is a cryptocrystalline form of quartz
Golden Onyx
Green Onyx
Honey Onyx
Lady Onyx
Ligth Green
Multicolor Red
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