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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

matter go
that which has mass and occupies space

solid go
matter that is solid at room temperature and pressure

crystal go
a solid formed by the solidification of a chemical and having a highly regular atomic structure

gem, stone, gemstone go
a crystalline rock that can be cut and polished for jewelry

opaque gem
a gemstone that is opaque

noun.substance

8 Subcategories

chrysoberyl go
a rare hard yellow green mineral consisting of beryllium aluminate in crystal form
opal go
a translucent mineral consisting of hydrated silica of variable color
cat's eye go
any of various gems (as chrysoberyl or chalcedony) that reflect light when cut in a rounded shape
coral, red coral, precious coral go
the hard stony skeleton of a Mediterranean coral that has a delicate red or pink color and is used for jewelry
jade, jadestone go
a semiprecious gemstone that takes a high polish
jasper go
an opaque form of quartz
lapis lazuli, lazuli go
an azure blue semiprecious stone
turquoise go
a blue to grey green mineral consisting of copper aluminum phosphate