BookmarkBookmark
Sign In | Creat An Account  Help
Wholesale jewelry,your satisfaction our business
Home >>Wholesale Bead Jewelry >> Gemstone terms defined, part one
Category Jewelry News
Tags:jewelry

Gemstone terms defined, part one


thoroughly understand a discussion of shapes and cutting styles, some terminology must be explained. A few basic terms are described below and illustrated.
Facets - the flat, polished surfaces or planes on a gemstone.
Table - the large, flat top facet. It normally has an octagonal shape on a round
gemstone.
Girdle - the narrow rim around the stone. The girdle plane is parallel to the table and is the largest diameter of any part of the stone.
Crown – the upper part of the gemstone above the girdle.
Pavilion – the lower part of the gemstone below the girdle.
Culet – The tiny facet on the pointed bottom of the pavilion, parallel to the table. Sometimes the point of a stone is called “the culet” even if no culet facet is present, which is usually the case with rubies and sapphires.
Fancy shape – Any shape except round, this term is most frequently applied to diamonds.
The cutting styles
Before the 1300s, gems were usually cut into un-faceted round beads or into cabochons (un-faceted dome-shaped stones). Color gemstones like rubies and sapphires looked attractive cut this way, but diamonds looked dull. It’s thanked to man’s interest in bringing out the beauty of diamonds that the art of faceting gemstones was developed. At first, facets were added haphazardly, but by around 1450, diamonds began to be cut with a symmetrical arrangement of facets. Various styles gradually evolved, and by 1920s, the modern round brilliant cut was popular.
As cutters discovered how faceting could bring out the brilliant and sparkle of diamonds, they started to apply the same techniques to colored stones. Today, ruby and sapphire are cut into the following styles.
Cabochon cut, it has a dome shaped top and either a flat or round bottom. This is the simplest cut for a stone and is often seen in antique jewelry. Today, this cut tends to be used for opaque, translucent, and star & cat eye’s stones. Transparent rubies and sapphires with lots of flaws are also frequently cut into cabochons.
Step cut, it has rows of facets that are cut parallel to the edges and resemble the steps of a staircase. Corundum (ruby & sapphire) is commonly fashioned into small step-cut squares or baguettes (square-cornered, rectangular stones). If step-cuts have corners that look as if they were clipped off, they’re called emerald cuts since emeralds are typically cut this way. Natural rubies and sapphires weighing a carat or more are seldom cut in an emerald style.

order cialis online
order cialis online
viagra
viagra
levitra
generic levitra 20mg
generic levitra 20mg
does levitra really work
does levitra really work
levitra side effects nih
levitra side effects nih
where to buy levitra online
where to buy levitra online
levitra pharmacy price
levitra pharmacy price
what happens if a woman takes viagra
what happens if a woman takes viagra
mexico viagra price
mexico viagra price
does viagra pills go bad
does viagra pills go bad
who makes generic levitra
levitra side effects high blood pressure
generic cialis malaysia
generic cialis malaysia
cialis online sales
cialis price in mexico
New Arrival
Home About us Rhinestone Earrings Jewelry Jewelry warehouse Wholesale western jewelry Bead Jewelry Wholesale Pearl Jewelry  Jewelry News
cute belly button rings turtle belly button rings long feather earrings cartier love bracelet heart friendship bracelet wholesale jewelry making supplies