The Connoisseur's Guide
To Precious Gemstones.
By Richard W. Wise ...
Precious Gemstone
Diamond, Ruby, Sapphire, Emerald and precious Opal are the precious gemstones. Any other rock or Mineral is referred to as semiprecious stone or just a rock.
Psilomelane ...
Precious Gemstones
Precious Gemstones include Diamonds, Emeralds, Sapphires, and Rubies.
Precious Stone
Precious Stone is a stone that is rare and expensive.
Precious Gemstone: Gemstones that are highly valuable for their hardness and rarity. There are only four precious gemstones: diamonds, sapphires, emeralds and rubies.
Semi-Precious Gemstones: Titanite (Sphene)
Sphene used in Jewelry
Source: Austria, Brazil, Canada, China, Germany, Italy, Madagascar, Norway, Pakistan, Russia, Sri Lanka, Switzerland, USA ...
PRECIOUS GEMSTONE
A precious gemstone is a stone or mineral that is valuable and very rare, and sought after for its beauty. Precious gemstones are diamonds, sapphires, emeralds and rubies.
PRINCESS CUT ...
A precious gemstone composed of pure carbon. Hardest of all known substances. Rated 10 on the Mohs scale.
diamond-cut rope
A portion of the chain is cut away at an angle and then polished to a high shine. see also ROPE CHAIN.
A precious gemstone composed of pure carbon. It is the hardest of all known substances and rated 10 on the Mohs scale.
Diopside
A mineral that ranges in color from white, deep green, to almost black.
A precious gemstone, and a member of the corundum family, rubies are always, by definition, red, but be aware that many other red gemstones and imitations might be assumed to be a ruby.
Semi-precious gemstones can also be used as the focal point of a promise ring. For example, if your partner loves a particular gemstone such as opal or tanzanite, you can purchase a promise ring with that gemstone to truly show your commitment.
Semi-precious Gemstones
A group of gemstones that are prized for their beauty, but are not one of the four so-called precious stones (Diamond, Emerald, Ruby or Sapphire).
Setting ...
Topaz: A precious gemstone that comes in many vivid colors including yellow, orange, red-brown, light to dark blue, pink-red, red, purple, light green, colorless and more. It is an 8 on Mohs’ scale of hardness.
This semi precious gemstone is closely associated with Christianity. Ancient history reveals that the gemstone first occurred when at the time of crucifixion, ...
A precious gemstone variety that is deep green colored. High quality emeralds are among the most valued of all gemstones. Flaws or inclusions are very common in emeralds, which makes their value less affected than that of diamonds or other gemstones.
ruby
A precious gemstone from the corundum family that range in colour from light pink to deep red. Rubies have a hardness of 9 on the Mohs Scale ...
Q. Name a semiprecious gemstone that is usually green?
Q. Describe an earring which has a J hoop
J hoop: A hoop earring in which the hoop is elongated into a shape resembling the letter J rather than being circular.
Sapphire is a precious gemstone (a type of corundum) that ranges in color from blue to pink to yellow to green to white to purple (mauve sapphire) to pink-orange (padparadscha sapphire).
Jade is a semiprecious gemstone which is usually green but sometimes whitish and consists of jadeite or nephrite. Jadeite is variable in colour and rarer so more valuable.
Sugilite is semi-precious gemstone generally a medium to dark purple it can also range from pink to brown to black. It is usually opaque with a waxy luster and often has brown, pink and white inclusions, looking like a purple version of turquoise.
Moukaite is a semi-precious gemstone, a variety of jasper from Australia. The color of moukaite varies from red-browns to pinks, with gold and white bands.
MOURNING JEWELRY ...
“The love of precious gemstones is deeply implanted in the human heart,' wrote George Kunz in his book, The Curious Lore of Precious Stones: ...
Semi-Precious Gemstones
The distinction between precious and semi-precious gemstones is often misunderstood, but fairly easy to understand.
1st Place
John Dyer
Precious Gemstones Co.
20.61 ct. opposed bar cut imperial topaz.
Aquamarine:A bluish, semi- precious gemstone from the beryl family. The name translates to "water of the sea" because of its color, which can actually range from very pale blue to a blue-green teal. The most prized color is a deep blue aqua.
In addition to its fascinating beauty, the pearl occupies a unique spot in the world of precious gemstones. Instead of being found in a core of rock, a pearl is made over time by a living creature, an oyster.
Can be stone studded RubyA precious gemstone, and a member of the corundum family, rubies are always, by definition, red, but be aware that many other red gemstones and imitations might be assumed to be a ruby.
Emerald is one of the most precious gemstones. The verdant green color is due to traces of chromium and vanadium in the beryl crystals. The ideal color is a deep uniform green with no or few inclusions.
Known by various names like emeraud in French, Smaragd in German and esmerelda in Portuguese, this rare and precious gemstone enjoys a repute which is cut apart from the rest.
Though Sapphire is a precious gemstone (as apposed to the cheaper, semi-precious stones), it is very reasonably priced. Across the industry, it is possible to get beautiful, high quality sapphires for a fraction of the price of rubies and emeralds.
A carat is the unit of weight used to measure diamonds and other precious gemstones. The term carat is derived from the Greek word keration, meaning carob beans.
Sugilite is a medium to dark purple semi-precious gemstone (it can also range from pink to brown to black).
Ruby: One of the four precious gemstones along with Diamonds, Emeralds and Sapphires. Ruby is a member of the corundum family whose color comes from chromium oxide in the stone.
5 - Treatment: Oiled - Color: Light to medium green Gets its name from the Latin smaragdus, which refers to a type of precious gemstone. Traces of chromium and vanadium in the crystalline structure produce the green color.
Rubellite is a very attractive semi-precious gemstone belonging to a group called Tourmalines under which fall 6 gemstones. The name comes from the Latin term 'rebellus' meaning 'reddish'.
[1] While keeping traditional diamond and precious gemstone merchandise in stock, the Rusers' specialty was baroque, freshwater pearl jewelry.
Sapphire: One of the four precious gemstones. The other three are diamonds, rubies, and emeralds. Sapphire is a member of the corundum family which come in a variety of colors from white to orange to green to pink.
Diamond: A clear transparent precious gemstone composed of pure crystallized carbon which has been highly compressed over millions of years. Diamonds are the hardest substance known to mankind, rating a 10 on the Mohs scale.
Gaspeite is a pale green to apple-green semi-precious gemstone that often has brown inclusions of its host rock. Gaspeite is translucent to opaque. This beautiful stone has only recently been used in jewelry, and is often set in silver.
Once colored gemstones were divided into two categories - Precious Gemstones, which included rubies, emeralds and sapphires and Semi-Precious, all other colored gems.
A precious gemstone has brilliance, beauty, durability and rarity, whereas a semi-precious gemstone has only one or two of these qualities. A gem is a gemstone that has been cut and polished.
Owning a diamond is everyone's dream, a long lasting desire to buy the most precious gemstone in the world and why not so? After all, a diamond is one of those few things on earth, every man & woman strives for.
Semi-precious (gemstone) Traditionally, the four precious gemstones are diamond, ruby, sapphire and emerald. Semi-precious gemstones include everything else.
The birthstone for April, diamonds are clear transparent precious gemstones composed of pure crystallized carbon. The carbon has been highly compressed over millions of years, resulting in the hardest natural substance known to mankind.
Calcedonio - This process results in glass that looks like the semi precious gemstone agate. This quartz stone is characterised by veins or bands of differing colours and this is replicated in this glass making technique.
Find engagement rings in diamonds, moissanite, diamonds and moissanite, or other precious gemstones. Beautiful engagement rings and wedding jewelry set in yellow gold, white gold, platinum, and titanium.
In ancient times, Amethyst was highly regarded among precious gemstones such as Ruby and Emerald but discoveries of huge Amethyst deposits since the 1800s have made the gem fairly inexpensive and very obtainable.
The places which supply crystals so large and beautiful that precious gemstones can be cut from them are, however, much, much rarer. The major green tourmaline deposits are in Brazil, Namibia, Nigeria, Mozambique, Pakistan and Afghanistan.
Aquamarine, the pale blue-green gemstone which reminds us of the calm soothing soft colors of the Caribbean Sea, is the precious gemstone of March. Transparency and lightness in color tone account for Aquamarines pastel shades of color.
About Opal
Opal is one of the few precious gemstones in the world and is Australia's national gemstone. Today over 90% of the world's precious opal is mined from what once used to be a vast inland sea in central Australia.
Carat is a metric unit of weight used for precious gemstones. One carat is equal to .20 grams, or conversely, 5 metric carats equal one gram. Carats are further divided into 100 points.
Industrial / ecomonic uses:
Semiprecious gemstone
Inaccurate data? Better photos? .
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garnet Considered a semi-precious gemstone that also occasionally occurs in diamond as an inclusion.
geiger counter A device measuring the level of radiation as in the irradiated green diamonds that have been exposed to americium-241.
Diamond - Definition: A Diamond is a clear transparent precious gemstone completely made of Carbon atoms (Chemical
Composition 'C') crystallised in a cubic (isometric) arrangement which has been highly compressed over millions of years.
Center stone - The prominent precious gemstone which is the centerpiece of a ring setting.
Chandelier Earring - An earring with a drop that dangles like a chandelier.
Fine diamond, jewelry, precious gemstones, and pearl
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Mines
Underground areas and caves where precious, semi-precious gemstones and minerals are excavated. The plural version is 'mine'.
Minas
The Spanish word for "mines". The plural translation is 'mina'. (see above) ...
It is one of the four precious gemstones, the other three being diamonds, rubies, and emeralds. Available in a multitude of eye-catching colors, ruby, emerald, sapphires of blue and pink hues are the most popular kind used today.
Excerpts from the book: Secrets of the gem trade (the connoisseur's guide to precious gemstones)
Seeing a true blue indicolite is practically a once-in-a-lifetime experience for most jewelers and probably most dealers.
David Federman, 1992 ...
Diamond - Diamonds are composed of pure carbon and diamond is the only Precious gemstone valued for its lack of color. With a 10 on the Mohs scale of hardness, they are the hardest of all known natural substances. Diamond is the birthstone for April.
Certification is a grading report that is given to a diamond (and sometimes a precious gemstone) by a reputable and recognized gemological laboratory that defines the physical characteristics and quality rating of a gem.
Certified Gemologist ...
 See also: Gemstone, Precious, Precious gem, Stone, Jewel
  
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