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Sinuous; curving in alternate directions.
A semiprecious stone either nephrite or jadeite, generally green or white in color, often used for carving figurines.
Of, or resembling glass; glassy
A flow of volcanic ash, dust, rocks and debris that cascades down the slope of a volcano during an eruption.
A soft mineral of a soapy feel and a greenish, whitish, or grayish color, usually occurring in foliated masses.
one of the major groups of rock that makes up the crust of the Earth; consists of pre-existing rock mass in which new minerals or textures are formed at higher temperatures and greater pressures than those present on the Earth's surface
a greenish-yellow colour, like that of a lemon.
A form of chrysoberyl that displays a colour change dependent upon light, along with strong pleochroism.
A common and widely-distributed metamorphic rock having bands or veins.
any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours