Simple categories matching colorless:

• stone,
• mineral,
• substance,
• gem,
• gemstone,

Members with property colorless:

• moonstone,
• colorless_sapphire,
• quartz,
• borax,
• diamond,
• silver_topaz,
• barite,
• calcite,
• kaolin,
• white_topaz,
• white_sapphire,
• sapphire,
• chalk,
• gypsum,
• topaz,
• feldspar,
• aragonite,
• opal,