Emerald (Sandwich Synthetic-Hydrothermal) Classification
Emerald (Sandwich Synthetic-Hydrothermal)
Light To Very Dark Green To Strongly Bluish Green, Slightly Yellowish Green
Lechleitner Synthetic Emerald
Refractive index, birefringence, optic character distinguished beryl from other materials, but magnification is essential for separating synthetic beryl from natural material. Sandwich synthetic emerald might show evidence of a seed plate with spicules with the tapered end indicating the direction of growth.
Misnomer: cultured emerald