Inorganic Gemstones

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Instruments

  • Refractometer: It is based on the principle of "total internal reflection". It is used to determine refractive index, optic character, optic sign and optic axis direction of gemstones.
  • Polariscope: It is used to find the optic character, optic figure and to detect pleochroism of gemstones.
  • 10x Loupe: It is used for diamond clarity grading, inspection of internal and surface features of gemstones.
  • Microscope: It is used to find minute inclusions and blemishes of gemstones.
  • Dichroscope: It is used to detect pleochroism and optic axis direction of gemstones.
  • Chelsea Filter: This instrument normally indicates the coloring elements present in certain green and blue color gemstones, namely emerald and spinel.
  • Spectroscope: This instrument helps in identification of gemstones by absorption spectrum and detects treatment like dyeing.
  • U.V. Lamp: It detects fluorescence and phosphorescence and helps to detect treatments done on the stones.
  • Reflectivity Meters: It is used to quickly determine refractive index of a gemstone.
  • Thermal Probe: This instrument is used to differentiate diamond from its simulant mainly from synthetic moissanite through head conduction process.
  • Advanced Techniques: These are some of the advanced instruments used to identify gemstone, treatments and source of its occurrence.

Did you know?

Jewellery is one of the most bought products online. An estimated $1 billion USD of diamonds are bought annually via the Internet. Over 40 million people use the Internet to trade!

In Germany, the garland of ambers is hung around the necks of the infants, so that their teeth might come out without much trouble.

In Turkey, people fix a piece of amber in the hubble-bubble, dogged by an age old belief that the presence of the jewel would destroy all the germs and no disease would spread, even after many have dragged their puffs from it.

In Greece, people think if wine is poured into the cups made of amethyst, one does not get drunk after drinking that.

In Rome, a talisman having coral pieces is considered very auspicious to quell the bad spells of evil look. The Romans were in the habit of hanging chains made of ancient coral pieces from the cradle of the infants to protect them from evil effects.

In China, people wear rings studded with tiny conch or oyster shells as they believe it cures all aches such as stomach ache, worms and like.

In India, pendants made of silver and studded with pearls are hung from the necks of the children to save them from any bad effects.

Greeks still believe, if women wear blue sapphires then no sense of immorality would pollute their mind nor can any fear of the supernatural can trouble them.

The Pope Innocent III had circulated an order asking all the priests wear blue sapphire, so that morality can be strengthened.

It is said about turquoise, that when the stone changes its color into yellow, it actually signals bad times to the person who wears it.

It is believed that a turquoise gifted to a friend or a lover turns his or her life into one of happiness and good luck.

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