Aquamarine - various shades - blue, green, pale blue and green. Feldspar - solid material, takes excellent polish. Unakite, Sodalite ...

Rough gemstones collected in South Africa

Hardness and specific gravity are two of the major characteristics of gemstones. Hardness of a gemstone is its resistance to scratching and may be described relative to a standard scale of 10 minerals known as the Mohs scale...

Mineral Gemstones

No one knows exactly when, where and who made the first attempt to cut diamonds. It is assumed that the first diamond cutting styles originated from India...

History of Diamond Cutting

Setting briolettes has been a confusing issue. Unavailability of drilling services, poor fitting caps, improper surface preparation, and incorrect adhesives have all been obstacles in the past, leading to a reluctance amongst jewelers to use briolettes.

Briolette Setting Techniques