Soviet Pink and Bicolor Ruby Loose Faceted Stones, Old Laser Stock

Soviet Pink and Bicolor Ruby Loose Faceted Stones, Old Laser StockThese are lab created laser rubies grown in the Alexandrov lab in the Soviet Union back in the 1980s. These are pink rubies grown in the Alexandrov lab, likely meant for use in lasers though we can't be 100% sure since they did sometimes grow jewelry material as well. Their color indicates the right dopant level for laser usage, while higher chromium concentrations are usually favored for jewelry applications. Some stones also have colorless zones, a

but I think all of them will cut good cabs

This is an actual fossilized dinosaur bone where the structures have been preserved in agate

100 grit topper laps are good for extra-coarse roughing of very large stones like dice

Lithium tantalate (LiTaO3) is an old rarity of the gem world and rarely seen today outside of industry

These are a mixture of rejected material (likely for surface chips or maybe minor optical misalignments) and cores/wafers that just didn't get used before the factory closed

Note that the purples show a dramatic color change to green under fluorescent lighting

It has the most vivid blue color you are likely to ever see in a gem--normally materials in this color range are soft like hauyne or water soluble like copper sulfate

these are gems which I bought from a retired jeweler who had a sideline doing cash for gold

including pink and golden laser garnet ( Ce+Nd) and green laser garnet (CTH:YAG and Er+Cr:YSGG)

custom grown cerium YAG with orange fluorescence

This is a lab created optical sapphire which I faceted into a single

The larger piece piece measures about 39