Yellow Gemstones

TRANGSUCVN.COM 2014-06-15 1523 lượt xem

Yellow Gemstones

Gemstone	Crystal System	Density	Hardness	Refractive index	Treatments
Agate	microcrystalline	2.66	6.5-7.0	1.544-1.553	dying
Amber	amorphous	1.08	2.0-2.5	1.54	heating, oiling, reconstitution
Beryl	hexagonal	2.72	7.5-8.9	1.577-1.583	heat, radiation, fracture filling, oiling
Chalcedony	microcrystalline	2.66	7	1.544-1.553	dying
Chrysoberyl	orthorhombic	3.72	8.5	1.746-1.755	heat, radiation
Citrine	hexagonal	2.66	7.0	1.544-1.553	heat
Diamond	cubic	3.52	10	2.417	radiation, drilling, fracture filling
Jadeite	microcystalline	3.34	6.5-7.0	1.660-1.680	dying
Opal	amorphous	2.15	5.0-6.5	1.450	fracture filling
Sapphire	hexagonal	4.00	9	1.762-1.770	heat, fracture filling
Smoky Quartz	hexagonal	2.66	7.0	1.544-1.553	none
Spinel	cubic	3.60	8	1.718	none
Tiger-eye	microcrystalline	2.64-2.71	7.0	1.540-1.550	none
Topaz	orthorhombic	3.53	8.0	1.619-1.627	blue is irradiated
Tourmaline	trigonal	3.06	7.0-7.5	1.624-1.644	heat
Zircon	tetragonal	4.00	6.50	1.810-1.815	heat