To identify imperfections in a diamond, look for tiny rents of fissures and specks. If the diamond has any of these, it is flawed. Note also that a real diamond can never have scratches on its surface; if it does, it is not a diamond.

The value of an emerald depends not so much on its freedom from flaws as the thickness of the stone, its depth and brilliance of colour.

The value of sapphire is not dependent on size but colour, purity and symmetry. A good Sapphire will appear blue both by day and by night.

The value of pearls depends on their size, texture, form, water and luster. Coloured Pearl is lighter in weight and more brittle than real Pearls.

The Prices of all the Precious and Semi-precious stones depends on following four factors i.e. 4C's.

· Colour
· Carats
· Clarity
· Cut.