Zombie Garnet, Yellow Green Laser Garnet Faceted Stones, Ce+?? YAG

This is 'zombie' garnet, a type of lab-created YAG laser garnet whose composition I do not precisely know.  Each stone is labelled with a letter and carat weight and can be purchased individually.  Some of these stones have inclusions.

This is an weird one, YAG doped with cerium and...something else?  This material was sold to us as chromium YAG sight unseen, but when we got it in it was clear it was not normal chromium YAG.  The variable yellow color and fluorescence all but guarantee it contains cerium, but the unusual green hue is very odd.  It may be a combination of cerium and chromium, or maybe a valence thing, or uh.  I don't know.  The result is a very strange look, a swampy yellow-green with an odd glow that makes it look almost opaque in some lighting.

This material is our Halloween special this year!

These stones also show unusual dual fluorescence, with a mix of bright yellow and pink under shortwave UV and yellow-green under both blue light and shortwave UV.

YAG has a high hardness of 8.25-8.5 and no durability issues. It is ideal for use in jewelry.

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