London-Blue Topaz Round Precision-Cut Faceted Gemstones, AAA-Grade

This AAA-grade round faceted London-blue topaz features precise facets on the crown, table and pavilion. Each gemstone has a consistent, saturated blue color and is the exact same size, making it easier add to your jewelry designs. One of the most popular topaz gemstones, London-blue topaz is a medium-to-deep grayish blue, sometimes with a green tinge—hues of the ocean depths; it is naturally flawless in most cases. This gem shows the superior cut, color saturation and active scintillation required to be classified as a top-quality AAA-grade gemstone. Topaz is one of the birthstones for November. This package includes 30 gemstones delivered in a protective gem jar. A hard, usually transparent aluminum silicate gem material, faceted topaz has a brilliance that rivals more expensive gemstones, making it an economical alternative to more costly gems. An "8" on the Mohs scale, topaz is tough and durable, ideal for all types of jewelry. Topaz forms in an orthorhombic structure with crystals that are usually prismatic. Pure topaz is colorless; impurities give the gemstone color. Gemstones can appear in a range of colors, with natural pink being the rarest. Most topaz colors are heat-treated or irradiated to enhance their color. In folklore, this gemstone is believed to dispel sadness and fear, to ward off poisons and to reverse infertility. Round-cut gemstones are highly popular and the most commonly available. Rio round gemstones are calibrated for size and hand inspected to ensure maximum attractiveness.

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Gemstone type: Topaz
Stone shape: Round
Stone size: 2.5mm, 1.5mm, 2mm, 3mm
Stone type: Natural
Color: Dark Blue
Birthstone: November
Enhancement: Irradiated (R)
Grade: AAA
Mohs hardness: 8
Refractive index: 1.609–1.637
Specific gravity: 3.53–3.56
Brand: AGTA
Mineral source: BRAZIL
Cutting center: Sri Lanka