Four Treasures Reference Database
Record No. 1984
Brilliance, windows and extinction in gemstones
Journal Article
Hughes, R.W. (1988) Brilliance, windows and extinction in gemstones. Gemological Digest, Vol. 2, Nos. 1 & 2, pp. 10–15.
RWHL*
Close Abstract
Hide Keywords
Copy Reference
corundum, fashioning.9, gems
A discussion of brilliance, windows and extinction as they relate to the face-up appearance of colored gemstones. Diagrams demonstrate that extinction is largely a function of cut.