We sell rough and cut gemstones, offering a wide range of rough gemstones for specimen-cabbing-facet and beautiful cut stones ready for your mount..Either for a new piece of jewelry or replacing a stone in an existing piece of jewelry.We offer thousands of lots, all with individual photos, what you see in the photo is what you will receive. Tommysrocks, an internet only business since 2002, giving our internet customers 100% of our attention.
CLARITY SCALE
IF VERY HIGH QUALITY & FREE FROM INCLUSIONS.
VVS HIGH QUALITY WITH VERY SLIGHT INCLUSIONS.
VVS1 HIGH QUALITY WITH SLIGHT INCLUSION.
VS FINE QUALITY WITH INCLUSION SLIGHTLY VISIBLE TO THE NAKED EYE.
VS1 FINE QUALITY WITH INCLUSION VISIBLE TO THE NAKED EYE.
SI GOOD QUALITY WITH INCLUSIONS VISIBLE TO THE NAKED EYE.
SI1 INCLUSIONS BECOMING PROMINENT TO THE EYE.
I INCLUDED.
THIS GEMSTONE IS GRADED: S I 1
Beryl (beryllium aluminum silicate)
Types/Color:
Aquamarine – light blue to blue-green
Bixbite – Red to strawberry-red
Emerald – Green
Goshenite – colorless
Heliodor – deep yellow
Morganite – Pink to peach
Other beryls may be referred to by their color, such as green beryl and yellow beryl.
Mohs hardness: 7.5-8
Refractive index: 1.57-1.6
Critical angle: 39.5°
Specific gravity: 2.65-2.75
Cleavage: None
Fracture: Conchoidal, tough
Dispersion: Medium (.014)
Heat sensitivity: None
Pleochroism: Dichroic – Golden: weak (yellow to light-yellow); Goshenite: colorless, no dichroism; Green: distinct (yellow-green to blue-green); Heliodor: weak (gold-yellow to greenish-yellow); Morganite: distinct (pale-pink to lavender-pink); Purple: distinct (purple to colorless); Yellow: (light yellow to medium yellow).
Birefringence (double refraction): Weak (.006-.009)
Crystal structure: Hexagonal
Treatments: Aquamarine is usually heat treated to remove the greenish cast. Morganite may be heat treated to change the peachy coloring to pink and may also be irradiated. Bixbite and heliodor may be heat treated and irradiated. Goshenite may be heat treated. Emerald is almost always treated with some filling agent to reduce the visibility of inclusions. These treatments are controversial and there is no consensus as to which treatment, if any, is appropriate.
Cutting: Emerald and bixbite with heavy inclusions can break apart. Otherwise, beryl is probably the easiest stone to facet.
Polishing: Beryl polishes easily with alumina or cerium oxide.
Product Review
