The Diamond is the birthstone of April and the anniversary gemstone for the 10th and 60th years of marriage. Diamonds were discovered in India in 500 B.C., and the name "diamond" comes from the Greek word "Adamas" which means unconquerable - suggesting the eternity of love.

Since ancient Greece, diamonds and diamond jewelry have been the traditional symbol of love, and the ancients believed they were hardened dew drops, splinters from the stars or crystallized lightning.

A diamond is the hardest substance known to humankind, and is made of a crystallized carbon that has unique powers of light reflection. Since diamonds are composed of a single element, they are the purest of all gemstones.

The Structure of a Diamond

Proportion refers to the angles and relative measurements of a polished diamond. More than any other feature, proportions determine a diamond's optical properties.

Studies have shown that table size, crown angle, and pavilion depth have a dramatic effect on a diamond's appearance.

Symmetry is a grading term for the exactness of shape and placement of facets. Variations in symmetry include off-center culets and tables, poor facet alignment, misshapen facets, out-of-round girdles, and wavy girdles.

A) When a ray of light touches the surface of a diamond, part of the light is reflected back, this is external reflection.	Reflexion
B) The rest of the ray penetrates the stone and is then reflected toward the center of the diamond. This is known as refraction.	Refraction