Inorganic Gemstones

Pyrope

Blood-red color of pyrope garnet
4.35 carat rough pyrope garnet

The blood-red color of pyrope garnet is due to its iron and chromium content. It rarely has inclusions, but when present they are rounded crystals or have irregular outlines. As with all garnets, pyrope has no cleavage, and fracture is subconchoidal to uneven.

Pyrope garnet is found in volcanic rock and alluvial deposits, and may, along with certain other minerals, indicate the presence of diamond-bearing rocks. Localities include Arizona (USA), South Africa, Argentina, Australia, Brazil, Burma, Scotland, Switzerland, and Tanzania.

Pyrope comes from the Greek pyrops, meaning fiery. Swiss and South African pyropes are lighter red than stones from Bohemia, where pyrope jewelry has been made for over 500 years.

Perfectly transparent, clear, uniformly colored crystals of pyrope garnet were popular for jewellery in the 18th and 19th centuries.


Properties
Chemical Composition: 
Magnesium Aluminium Silicate - Mg3Al2(SiO4)3
Colors / Varieties: 
  • Colorless (pure), red, slightly orange-red, violet-red in darker tones. High intensities common in the red hue.
  • Four ray star pyrope.
Hardness: 
7.25
Specific Gravity: 
Pure: 3.582; Range: 3.65 - 3.80
Refractive Index / Birefringence: 
Pure: 1.714; Range: 1.720 - 1.740
Dispersion: 
0.027
Magnification: 
Crystals and needles are present.
U.V. Fluorescence: 
Inert
Spectrum: 
  • Iron rich: 575nm, 527nm, 505nm
  • Chrome rich: strong diagnostic band between 520nm and 620nm; doublet of moderate strength at 687nm and 685nm and weak lines at 671nm and 650nm.
Cause of Color: 
Chromium, Iron
Treatment (Enhancement): 
-
Specific Tests & Remarks: 
-
Simulants (with key separation tests): 
Rhodolite (R.I., S.G., spectrum), Red Spinel (spectrum, U.V. fluorescence, inclusions), Almandine Garnet (R.I., S.G., spectrum), Tourmaline (optic character, spectrum), Glass (spectrum, U.V. fluorescence, inclusions), Synthetic Cubic Zirconia (R.I., S.G., dispersion, lustre), etc.
Sources: 
Bohemia, South Africa, U.S.A. (Arizona), Sri Lanka, Madagascar
Cuts & Uses: 
Facetted, cabochon, beads, carvings, etc.

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.

Poll