4 servers published under digitalgemology. 4 answered our last handshake, 0 did not, and between them they expose 19 tools.
4 servers 4 answering 0 not responding
Gemstone and diamond cuts: ray-traced brilliance, fire and sparkle in 7 gems, 3D and faceting files
Identify gemstones by refractive index, birefringence, SG, pleochroism and spectrum. Compare 7 gems
Gemology lessons to search and quote: the 4 Cs, diamond anatomy, grading reports, moissanite
Gemology glossary: grading report terms, 4 Cs, clarity, colored gemstones, how sparkle is measured