Gemstones

Gemstones

Industry: Jewelry

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Gemstones

brilliance

Fashion; General jewelry

The reflection and refraction of light displayed through a stone. Brilliance is sometimes referred to as "internal luster" to distinguish it from surface luster.

Color-blue

Fashion; General jewelry

Bright shades of blue to blue-green color, color blue tourmaline is another rare tourmaline color, is quite a collection of high quality specimens.

Centre stone

Fashion; General jewelry

The centre stone is the prominent centre piece in a jewellery setting that has multiple gemstones. See also Side Stone.

Chanthaburi

Fashion; General jewelry

The city in southeastern Thailand famous as one of the world centres for gemstone processing and trading. Chanthaburi is also famous for its weekend gemstone market.

The cat's eye effect sometimes seen in gemstones such as chrysoberyl, apatite and tourmaline is known by the technical name of chatoyancy. The effect is caused by tiny parallel inclusions that give ...

Window

Fashion; General jewelry

In a well cut faceted gem, the pavilion facets (those on the lower half of the stone) should reflect light back out the top or table of the stone. If the facets are cut below the critical angle for ...