1. (noun) a hard compact kind of calcite

• mexican onyx
• onyx marble
• oriental alabaster

2. (adjective) of or resembling alabaster

• alabastrine

1. (noun) a compact fine-textured, usually white gypsum used for carving

• gypsum

2. (noun) a hard compact kind of calcite

• calcite

3. (noun) a very light white

• white
• whiteness