What is a concave cut gemstones?
Concave faceting involves cutting pavilion facets to curve inward, usually in conjunction with some flat facets on the crown. The curved facets scatter more light into the interior of the stone than traditional flat facets, resulting in a more brilliant gem.
What is a fancy cut gemstone?
An Introduction to Gemology Home » Learning Center » Gemology » An Introduction to Gemology » An Introduction to Fancy Gem Cuts. by Phoebe Shang, GG , International Gem Society.
What is a StarBrite cut?
StarBrite™ Cut They are faceted using a special grooving technique carved on the pavilion. This proprietary technique gives the impression of greater overall brightness and also gives great “Tilt” performance as the gem is viewed at different angles.
What is a Portuguese cut?
The Portuguese-Cut refers to a particular type of fancy gemstone cut. The Portuguese cut thus exhibits an extra row of facets on the crown, and this unique style enhances the brilliance of the gemstone.
What is the side of a cut gem called?
facet, flat, polished surface on a cut gemstone, usually with three or four sides. The widest part of a faceted stone is the girdle; the girdle lies on a plane that separates the crown, the stone’s upper portion, from the pavilion, the stone’s base.
Which gemstone cut is most expensive?
The Most Expensive Gemstone Cut: Round Brilliant The round brilliant cut holds the distinction of being the most expensive cut (especially for diamonds) and for having the highest degree of sparkle among all the other cuts.
What is Quantum cut?
Quantum cutting (QC) is a phenomenon that one high-energy photon is converted into two or more than two photons with low energy. QC was first reported in YF3: Pr3+, in which one ultraviolet (UV) photon was converted into two visible (VIS) photons of lower energy.
What is a fantasy cut?
Fantasy cut gemstones have grooves, optic dishes, and concave facets – all made possible by the development of tools to cut these design elements into gem materials.
What is briolette cut?
Briolette or Briolette cut is a special type of cut for gemstones. It is the oldest gem cutting technique. This cut is characterised by pear-shaped gemstones; from short pears to elongated ones… this cut showcases a wide range of beautiful cuts you will fall in love with instantly.
What is the most sparkly stone?
With a BRI of 2.65 to 2.69, moissanite is the world’s most brilliant gemstone. This means the speed of light refracting in moissanite is 2.65 to 2.69 times slower than the speed of light in the air.