THE MATERIAL LIBRARY
Plum Agate
A descriptive trade name usually applied to plum-colored or plum-patterned agate.
Colors & patterns
Plum, mauve, purple, cream and brown tones, with patterns varying by supplier.
Typical origins
The name alone does not establish a mine or country. Request documented origin for the specific rough or cab.
Hardness
About 6.5–7 if confirmed as agate
Choosing & setting this material
Confirm that the material is agate and ask whether the color is natural or dyed. The illustration represents a possible appearance, not a standardized variety or exact specimen.
Care & cleaning
Clean gently with lukewarm water, a little mild soap and a soft cloth, then dry. Avoid steam, ultrasonic cleaners, harsh chemicals and sudden temperature changes, especially when treatments are unknown.
Origins above describe typical sources of the material, not the origin of an illustrated or stocked stone. Hardness measures scratch resistance, not resistance to breaking. Confirm the identity and treatments of the actual piece.
Further reading: Material reference · GIA: gem treatments