An asterism (from Ancient Greek ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone. It can appear when a suitable stone is cut en cabochon (i.e. shaped and polished, not faceted). A gemstone that exhibits this effect is called a star stone or asteria.

Aster Gem & Jewelry Co.,Ltd.. Always strives to both play a leading role in high-end quality cutting service globally and be the most competitive supplier of precious and semi-precious stones with the finest quality in the industry.

The Aster Gem Pendant is a clean simple piece, perfect in a variety of interior spaces. The artisan blown and cast glass, undulated gently in an organic form, has a inner floret, geo, or zircon shaped gem that lights up to create an interesting conversation piece.

Aug 20, 2019 · Asterism is actually a visual trick that occurs because the tiny fibers within the gem have a higher refractive index than the gemstone itself. This causes a bright star-like pattern to reflect off of the fibers and formulate little outward rays.

An asterism is an optical phenomenon displayed by some rubies, sapphires, and other gems (i.e. star garnet, star diopside, star spinel, etc.) of an enhanced reflective area in the shape of a "star" on the surface of a cabochon cut from the stone.

Jun 21, 2024 · Asterism is an optical phenomenon where a star-like pattern appears on the surface of a gemstone when it is viewed under a single light source. This star effect is typically seen in cabochon-cut gems (smooth, rounded, non-faceted shapes) rather than faceted stones.

Feb 6, 2020 · Gems that display asterism are highly sought by collectors. The gem type, the clarity of the star and number of star points – four, six or 12 – are factors that can influence its value. To highlight the star and show its optimal effect, the …

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Aster Gem & Jewelry Co., Ltd. ----- Established in 1993, Aster Gem and Jewelry is one of the leading cutting service providers & reliable gemstone dealers and Jewelry manufacturer, with 16 years of experience on high-end cutting service.