Gemological Data
Morganite
Generic Information:
Name Origin: Named after the famous American mineral collector JP Morgan.
Main Colors: Light pink to dark pink, violet-pink, peach-pink, or salmon.
Producing Countries: Most Morganite on the market comes from pegmatite mines in Minas Gerais, Brazil, and Mozambique, Africa. Afghanistan, Namibia, and the US have been minor and inconsistent sources. Although currently only a small producer, the original Madagascar deposit still sets the standard for the best deep magenta-colored material. Mozambique has stood out in the last ten years, with large productions of material in the salmon pink color in the Marupino mine and purê pink in the Moiam mine.
Common Shapes: It is more common to cut them as ovals, rounds, cushions, and drops, as well as trillons, hearts, and briolet. Easy to cut stone, it can also be cut in larger calibrated sizes, pairs and sets of necklaces, earrings, and rings.
Usual Treatment: Some can be found without treatment. However, most are now treated with irradiation and then heat to improve the color, removing unwanted yellow and brown shades, and making them darker. Heating is done at relatively low temperatures (about 280 °C). Treatment is stable.
Gemological Data:
Species: | pink variety of the beryl species. |
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Species: Hardness of Mohs: | pink variety of the beryl species. 7,5/8 |
Species: Specific Density: | pink variety of the beryl species. 2,72 (±0.12) |
Species: Cleavage: | pink variety of the beryl species. Indistinct |
Species: Fracture: | pink variety of the beryl species. Conchoid, irregular, splintered |
Species: Crystal System: | pink variety of the beryl species. Hexagonal, hexagonal prisms, columnar crystals |
Species: Chemical Composition: | pink variety of the beryl species. Be₃Al₂(SiO₃)₆ Beryllium Aluminum Silicate |
Species: Transparency: | pink variety of the beryl species. Transparent to opaque |
Species: Refractive Index: | pink variety of the beryl species. 1,577-1,583 (±0,017) |
Species: Birefringence: | pink variety of the beryl species. 0,005 a 0,009 |
Species: Dispersion: | pink variety of the beryl species. 0,014 |
Species: Pleochroism: | pink variety of the beryl species. Dichroism, weak to moderate, usually light red to purple-red. |
Species: Luster: | pink variety of the beryl species. Vitreous |
Species: Fluorescence: | pink variety of the beryl species. From inert to weak, pink, or light violet (UVL and UVC) |