https://youtu.be/_HdlAJ2YQgs

https://nibm.lk/kirulapona/

https://youtu.be/R8Mg8QVEGW8

https://youtu.be/baVnY7EFZIg

https://www.gemrockauctions.com/learn/did-you-know/top-5-most-expensive-gemstones

https://www.bluenile.com/blog/diamonds-jewelry/inclusions-good-in-diamond

https://www.jewelry-secrets.com/Blog/can-inclusions-be-a-good-thing/

https://www.brilliance.com/diamonds/what-are-inclusions-on-diamonds

https://youtu.be/0rLYSzR_Bvw?list=TLPQMTgwNTIwMjBwQnVG7amZOQ

https://youtu.be/0rLYSzR_Bvw?list=TLPQMTgwNTIwMjBwQnVG7amZOQ

The luster of a diamond is adamantine to waxy and is considered to have a metallic luster. Luster means “light,” and is derived from the Latin word lux. Luster suggests brilliance, gloss or radiance.Sep 28, 2017

https://www.gemsociety.org/article/gemstone-luster-polish-luster-fracture-luster/

• Vitreous: The luster of glass.
• Resinous: The luster of resin.
• Pearly: The luster of pearls.
• Greasy: Looks like it is covered in a thin layer of oil.
• Silky: The luster of silk.
• Adamantine: A hard, brilliant luster.

https://www.sgs.lk/?utm_source=googlemybusiness&utm_medium=Referral_GMB&utm_campaign=SGSLK01

https://youtu.be/_qMactjdsL0

https://news.internetstones.com/rare-ceylon-alexandrite-for-sale

https://www.gemsociety.org/article/star-gemstones-tips-for-beginners/

https://youtu.be/1e4H4Rmip0Y

https://youtu.be/qEan0IEGvao

https://youtu.be/bPekRm8UaXE

This diamond, with its particularly distinctive inclusion scene, also serves as a valuable research material. Gemologists welcome the opportunity to study gems with such unusual features.

While manufacturers typically seek to minimize or remove inclusions in gem-quality diamonds, a few are specifically cut to highlight these features. Certain hydrogen-rich diamonds can yield fascinating inclusion forms when faceted. One such stone is the 5.24 ct Rare Sun diamond (see above), which GIA’s New York laboratory recently had the opportunity to examine. Framed at the center of this Fancy Dark yellowish brown modified octahedron is an eye-visible cloud inclusion that scatters light to form the image of a star and its shining rays. The inclusion’s orientation gives it an unusually distinct six-fold symmetry, which is very rare. The overall shape of the Rare Sun diamond has been precisely polished so that as light touches various parts of its surface, a different ray beams through. Achieving this effect required extremely precise fashioning—even the slightest error in cutting or polishing would have diminished the effect.

Very few diamonds have the potential to display this star-like pattern, and fewer still ever have this potential recognized and achieved. Diamonds with unusual inclusions, especially inclusions that suggest the shape of other objects, are also prized by gem collectors and seekers of the uncommon. The Rare Sun diamond is a large and noteworthy example and could be considered among those unique diamonds.

https://www.gia.edu/gems-gemology/fall-2019-gemnews-rare-sun-diamond

https://www.whiteflash.com/about-diamonds/diamond-education/diamond-glossary-1534.htm

    1. Maximum brilliance

    2. Maximum fire.

    3. Perfect Optical     1. Maximum brilliance

    2. Maximum fire.

    3. Perfect Optical Brillance

    4. Perfect Optical Symmetry

    5. Edge-to-edge brilliance

    6. Widest possible diameter

    7. Contrast brilliance

    8. Perfect and distinct star pattern

    4. Perfect Optical Symmetry    1. Maximum brilliance

    2. Maximum fire.

    3. Perfect Optical Brilla    5. Edge-to-edge brilliance

    6. Widest possible diameter

    7. Contrast brilliance

    8. Perfect and distinct star pattern

5. Edge-to-edge brilliance

    6. Widest possible diameter

    7. Contrast brilliance

    8. Perfect and distinct star pattern

http://www.eightstar.com/what-is-an-eightstar%E2%84%A2-diamond.html

https://today.line.me/id/pc/article/Oscars+2020+Scarlett+Johansson+sparkled+in+US+2+5+million+of+Forevermark+gems+what+other+jewellery+brands+did+stars+rock+on+the+red+carpet-lYNag3

https://cutwise.com/pr/?fbclid=IwAR1WugQnheDlbC0QE-XU8uPbFTEiNJlkb09DnhHt8ZB-PgDupMn2aXlr4rU#/22

Dr. Edward Gubelin, authority on gem inclusions, provides photomicrographs ... microscopic formations are known, can quickly make positive identification. ... diamond's facets and identify it quite accurately — so long as the stone is not recut. ... other at an angle of 60 degrees produce the star effect when seen from above.

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https://www.ganoksin.com/article/different-beryl-varieties/

https://www.mineralminers.com/html/bixmins.stm

https://www.gemdat.org/gallery.php?min=690

http://gemmecouture.com/the-rarest-gemstones-in-the-world/

https://www.forbes.com/sites/trevornace/2015/11/02/12-most-expensive-gemstones-world/#2d5615231538

http://hyperphysics.phy-astr.gsu.edu/hbase/Minerals/beryl.html

https://www.vividjewelers.com/education/diamond-guide/

https://www.gia.edu/search?q=star++diamonds

https://www.gia.edu/gia-news-research-value-factors-gem-cutting-styles-definitions

https://www.gempundit.com/gemstones/zambian-emerald

Zambian emerald is a superior variety of natural emerald gemstone, known best for its deep green hue with slight bluish overtone and superior clarity. It is also regarded as May Birthstone in western astrology.

https://www.financialexpress.com/world-news/pink-star-diamond-breaks-world-record-for-a-gemstone-sold-at-auction-fetching-71-2-million-in-hong-kong/614829/

https://www.nationaljeweler.com/diamonds-gems/supply/8123-lucara-recovers-gem-quality-blue-pink-diamonds

https://www.gemrockauctions.com/auctions/019-ct-blue-diamond-top-class-gemstone-db35-878552

http://www.goldenstardiamonds.com/

https://www.jckonline.com/editorial-article/sothebys-blue-diamond-sell/

https://www.smithsonianmag.com/history/true-story-koh-i-noor-diamondand-why-british-wont-give-it-back-180964660/

https://gem-a.com/news-publications/news-blogs/gems-from-gem-a/gem/famous-gemstones-star-india-sapphire

https://en.wikipedia.org/wiki/Eagle_Diamond

https://www.wpdiamonds.com/top-10-expensive-diamonds/

http://www.gem.org.au/the-resources/glossary/

https://instoremag.com/once-in-a-generation-pink-diamond-could-sell-for-60m-setting-a-per-carat-price-record/

https://www.aliexpress.com/item/32887254883.html

https://www.gempundit.com/gemstone-recommendation

https://www.liin.lk/liinked-way?fbclid=IwAR15ZWYhUfe7u70UYI14E8CGtGp3K57dkRsNpJn6l9tlytfw8pQ6hI6hZzQ