chemically pure
Jade is white or colorless when it's chemically pure.
color patterns
Artists pay close attention to jade's color patterns to carve the most interesting objects. What do you think this is a carving of?
stained with graphite and colored with manganese
These objects are really beautiful. Graphite, the black stuff in pencil lead, stained this jade tiger black. And a little manganese colored pure jade lavender.
colored with chromium
Sometimes, jade is colored by minor chemical changes in its mineral composition. See this pendant? A little chromium can make jade emerald green!
stained with rust
Sometimes, jade can be stained naturally. This happens when another mineral gets between the grains and turn jade another color. Iron oxide stained this jade orange.
treasured colors
The color of jade affects its value. Emerald green and lavender jade are really valuable in Asia. And a long time ago, blue-green jade was a treasured color in Mesoamerica.
Image Credits:
All photos: courtesy of AMNH