Category Nuances for null:

• semiprecious,
• precious,
• rare,
• colourful,
• vibrant,
• soft,
• costly,
• sedimentary,
• complementary,
• large,
• lustreless,
• opaque,
• fine,
• natural,
• valuable,
• powdered,
• ornamental,
• synthetic,
• light,
• solid,
• transparent,
• clean,
• beautiful,
• fabricated,
• real,
• genuine,
• earthy,
• raw,
• earthly,
• lapidary,
• crushed,
• colored,
• porous,
• traditional,
• faceted,
• cool,
• sensitive,
• rich,
• translucent,
• fragile,
• massive,
• neutral,
• blue,
• colorful,
• popular,
• new,
• organic,
• hard,
• exotic,
• unusual,
• coloured,
• sacred,
• softer,
• native,
• expensive,
• rough,
• harder,
• ceremonial,

Simple Categories for null:

• blue,
• stone,
• gemstone,
• color,
• object,
• item,
• thing,
• gem,
• matter,
• mineral,
• tint,
• style,
• material,
• pastel,
• substance,
• rock,