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...

Look up asterism in Wiktionary, the free dictionary. Asterism may refer to: Asterism (astronomy), a pattern of stars Asterism (band), a Japanese rock...

values for a number of wood species; some results are reported below: Asterism (gemology) – Star-shaped reflection Optical phenomena – Observable events that...

and artificial intelligence company Asterias, a genus of sea star Asterism (gemology) Astraea (disambiguation) Astrea (disambiguation) Astrée (disambiguation)...

greasy" lustre). Some minerals exhibit unusual optical phenomena, such as asterism (the display of a star-shaped luminous area) or chatoyancy (the display...

similar structures, exhibit similar crystal forms (isomorphism)." Asterism (gemology) Polymorphism (materials science) Goldschmidt tolerance factor Solid...

perpendicular hematite-ilmenite needles (gold), magnetite platelets (black), asterism (the star effect) and hexagonal growth. Hematite-ilmenite needles, which...

three-point or six-point asterism or "star". These rubies are cut into cabochons to display the effect properly. Asterisms are best visible with a single-light...

largest double-star ruby. A ruby is known as a "star ruby" if it contains an asterism (distinctive star-shaped light refraction) in the gem. The Neelanjali Ruby...

Rainbow Lattice Sunstone from the Harts Range, Australia". Journal of Gemology. 36 (1): 44–52. Lalous, G., 2018. Journal digest: Delve into the colours...

an independent report from a respected laboratory such as GIA, Lotus Gemology, or SSEF, is often required by buyers before they will make a purchase...

describe this unique and beautiful phenomenon, which in gemology is termed play of color. In gemology, opalescence is applied to the hazy-milky-turbid sheen...

fixed-star pattern in a mineral, and differs from asterism, which is a moving-star pattern in a mineral. Asterism is the result of tiny mineral inclusions, minute...

of ilmenite, hematite (gold color) and magnetite (black). It exhibits asterism and hexagonal growth, a lack of UV fluorescence, healed fractures and polysynthetic...

June 2021. Retrieved 12 June 2021. "Phenocryst". Dictionary of Gems and Gemology. Springer. 2009. p. 661. doi:10.1007/978-3-540-72816-0_16699. ISBN 978-3-540-72816-0...

ISSN 1993-0321. S2CID 250646998. "Alluvium". Dictionary of Gems and Gemology. Springer. 2009. p. 19. doi:10.1007/978-3-540-72816-0_528. ISBN 978-3-540-72816-0...

Primeval Forests, tr. by Thomasina Ross, A.S. Barnes & Co. Luminescence, The Gemology Project World's largest night-shining jewel displayed in S China, China...