These are fancy colored beryls in fancy cuts, including aquamarine, emerald, orange-red beryl and deep blue-green beryl.
These are hydrothermal beryls grown in a variety of colors. Some are similar to natural beryl, with aquamarine and emerald, while others are more exotic: fiery orange-red beryl and a very odd deep blue-green-purple dichroic variety. These stones have some fractures and inclusions like a natural beryl would.
Hydrothermal growth is a difficult and involved process, involving toxic chemicals and dangerously high pressures and temperatures--however, the process is also a lot more like natural growth and results in crystals with a more natural look. It's also one of the only ways to grow crystals like beryl which can't be grown by melt methods.
