Rough TGG Lab Garnet, Rare Magnetic Scientific Crystal Size:7-8g you'll want this 1/4 inch

you'll want this 1/4 inch collet add-on

so there was an obvious difference when cut

The chain is 1

Rutile has by far the highest dispersion of any gemstone worth the name which means it splits light into its component spectrum

Rough TGG Lab Garnet, Rare Magnetic Scientific Crystal Size:7-8g you'll want this 1/4 inchThis is rough terbium gallium garnet aka TGG. Rough pieces are sorted by gram size, with representative photos of crystals on a 1 mm grid. TGG is a very cool synthetic material. It has the same structure as a natural garnet, but has a composition that would never be possible in nature. The result is a bright and very dispersive gem with optical properties similar to diamond (cubic crystal structure with a lower RI but the same dispersion as diamond),