Precious Stones Guide Vol 7
How Stones Are Distinguished From One Another
An Explanation of Refraction
An Explanation of Double-Refraction
Table of Refraction in Gems
Differences in Gem Refraction ...
Streeter: Precious Stones and Gems
Introduction & Preface
Sec. I, Ch. 1: Precious Stone or Gem Defined
Sec. I, Ch. 2: Where Precious Stones are Found
Sec. I, Ch. 3: Uses in Bygone Times
Sec. I, Ch.
Featured Precious Stones, Birthstone, Gemstones Jewelry Listing
Page 1 2 3
1. A Kaleidoscope of Gems
Quality, natural, unique gemstones from around the world.
The Precious Stone Age - JewelInfo4u
By: Mathew Abraham
Summary: The interest in gems of all kinds has dramatically increased over the recent years.
Semi Precious Stones Origins
Agate
No gemstone is more creatively striped by Nature than agate, chalcedony quartz that forms in concentric layers in a wide variety of colours and textures.
Jade is a semi-precious stone that ranges in color from green to white to lilac to brown to almost black. Translucent jade is more highly valued than opaque jade. Jade is often cabochon set; stones with imperfections are often carved.
Certification: A grading report given to a precious stone by a reputable and recognized laboratory that defines the physical characteristics and quality rating of a gem. See Assay and IGI ...
Learn All About Sapphires, Emeralds, Rubies and Semi-Precious Stones
Discover interesting facts about your favorite gemstones, and learn all about gemstone cuts, clarity, color and more.
Precious stone: "A gemstone that, owing to its beauty, rarity, durability, and hardness, has the highest commercial value and traditionally has enjoyed the highest esteem since antiquity; specifically, diamond, ruby, sapphire, ...
Precious stones - Rare and costly gems such as diamonds, emeralds, rubies, and sapphires
Princess cut - Similar to a brilliant square-cut gemstone
Pyrope garnet - A deep red mineral, similar in appearance to ruby ...
Precious Stones Rare and costly gems such as diamonds, emeralds, rubies, and sapphires.
Retail You pay a merchant's full retail price for beads and supplies. ...
Precious stone: See Precious Gemstone.
Princess cut: A relatively new fancy cut for gemstones based on the multi-faceted square cut. It is square when viewed from the top ...
Precious Stone - Four gemstones are considered precious stones - Diamond, emerald, ruby and sapphire. They are especially prized for their beauty and rarity.
Princess length - a single strand necklace which is 18" long.
Precious Stones:
An obsolete term which generally is used to refer to diamond, emerald, sapphire, or ruby.
Prong: ...
Semi-precious stones: A stone that is less rare and less expensive than precious stones, but is still valued for its beauty. Examples are peridot and amethyst.
SEMI-PRECIOUS STONES
Also known as Gemstones, these are stones produced from organic sources such as rocks, stones, plants (amber) and animals (pearls).
Precious Stones - Entrance to the world of precious stones
Birthstones - Background and history of birthstones and calendars
Collector’s Corner - Special section of Palagems.com just for gem collectors ...
Precious stones are minerals, rocks or petrified materials which when cut and polished can be used in jewelry. Diamond one of the most important precious stones is the hardest natural material on earth.
Precious stones have long been associated with symbolism, superstition, mysticism and medicine.
Precious Stones -The Big Five
Jewelry of Semi-Precious Stones: Stylish Things of Beauty
The Lure Of Turquoise ...
Precious stones including sapphires, rubies and emeralds were used only for decoration, and when used they were en cabochon (round cut). Diamonds were typically rose-cut.
Precious stones are found without doubt at several places in the Kingdom of Siam, as, when travelling, I often came across them in the beds of streams and amongst the gravels of rivers, but nowhere are there so many as in the province of Chanthaburi.
Precious Stones: One of three categories of natural gemstones. The most valuable, as distinguished from semi-precious and decorative. These are: diamonds, rubies, emeralds, sapphires and pearls.
Precious stones typically embody the focal points of a piece of jewelry.
A precious stone (or pearl) that is suitable to be cut or polished for use in jewelry.
geode
Rock which contains a cavity lined with quartz or other gemstone crystals.
This precious stone is one of the most difficult gemstone to cut because of the many inclusions and color zonings.
Semi-Precious Stones
Gemstones those are valued for their beauty and not covered under any one of the four 'Precious Stones', Diamond, Emerald, Ruby or Sapphire, are known as Semi-Precious Stones.
semi-precious stone - Any stone suitable for use in jewelry that is not a diamond, ruby, sapphire, or emerald.
solder - A metal alloy that, when melted, fuses metal together.
spacer beads - Small beads used as accents and to separate larger beads.
Semi-precious stone which is greenish-blue in color.
Two-Tone
Jewelry having two colors or two shades of the same color, typically achieved through mixing metals.
Semi-precious Stones:
An obsolete term used to describe gemstones which are not diamond, emerald, sapphire, or ruby. This term is often misleading as many "semi-precious" gemstones are extremely valuable, and rarer than precious stones.
Shank: ...
A semiprecious stone that varies from translucent to opaque and has color from yellow to reddish brown.
Casting ...
A semi-precious stone of transparent golden yellow, green yellow or brown
Citrine
A variety of quartz found in a range of colors from light yellow to red-orange to almost brown ...
Gems and Precious Stones of North America
This book is an overview of the important gem and mineral occurrences known prior to 1892. Excellent descriptions of many now-classic finds are described, including Mt.
Corundum
Precious stones, most common used are blue Sapphire and red Ruby. Consist of Aluminum oxide. Avaialble in many different colors.
Hardness : 9 Refractive Index : 1.762- 1.770 Density : 3.97-4.03 ...
THE ISRAEL PRECIOUS STONES AND DIAMONDS EXCHANGE Ltd.
THE LONDON DIAMOND BOURSE AND CLUB
THE NEW ISRAEL CLUB FOR COMMERCE IN DIAMONDS Ltd.
weight for precious stones. Karat is used to indicate degrees of quality in gold.
CARBON. A tetrad (having four sides), non-metallic mineral element occurring in two crystalline forms, diamond and graphite, and one amorphous form, coal.
Diamond: A precious stone which can be manmade or created in the earth's core through heat and pressure on carbon atoms and is frequently used in jewelry.
Onyx, a semi precious stone that is black or white in color lends itself to flat jewelry creation such as cameos, since it has a layered structure. Onyx belongs to the chalcedony family of minerals, which are somewhat porous gemstones.
Opals are semi-precious stones that are luminous and iridescent, frequently with inclusions of many colors ("fire"). Opal is a mineral composed of noncrystalline (amorphous) silica (and some water) and is a species of quartz.
An opaque, semiprecious stone found in shades of green, light purple, yellow, pink and creamy white shades. The term Jade is often used to describe both Jadeite and Nephrite which are similar in appearance and use.
Max Bauer, Precious Stones, trans. L.J. Spencer (1904; reprint
ed., New York: Dover Editions,1968) pp. 1-3.
14. G-F Herbert Smith, Gemstones (London: Methuen & Company, 1940), pp. xi-xii. This book was originally published in 1912.
15. Edwin W.
A diamond is a precious stone that is pure native crystallized carbon, highly valued, especially when free from flaws and cut into various forms with differently shaped facets of variable numbers and positions, ...
A rounded semi-precious stone or synthetic material usually black, fitted into the watch crown as an ornament.
CALENDAR ...
Garnet: A semi-precious stone found in many colors but usually in a dark, crimson red, but can also range from deep red to deep purple to brown orange and green ...
onyx
A semiprecious stone that is a form of agate, usually with parallel bands of black and white ...
A type of semi-precious stone from the pectolite family ranging from pale to sky blue in color. The opaque stone often has white streaks running throughout and sometimes has tinges of red to brown.
A semi-precious stone related to carnelian. This brownish-red, opaque gemstone was once used extensively for seals and was carved using intaglio. Sard was named for Sardis, the ancient capital of Lydia.
Opal
A semi-precious stone with a rainbow-like iridescence which are categorized as three types: opalescent precious opals, yellow-red fire opals and the common opal
Orient
The characteristic sheen of fine natural and cultured pearls ...
Onyx: A semi-precious stone composed of chalcedony (a variety of quartz) found naturally in white or gray. The white variety is generally dyed black for onyx.
Opal: A non-crystalline, iridescent silica.
Channel- The precious stones are secured between two bands of precious metal, thus allowing them to be set close together. The result is a line of tanzanites with no metal showing in between.
Max Bauer, 1904, Precious Stones
Figure 2
Afghan miners drilling the limestone for rubies at Jagdalek , Afghanistan .
(Photo: Gary Bowersox) ...
Precious and semi-precious stones have been used in jewelry making for as long back as the human race has existed. Today they are also highly treasured as collectors items in both raw and treated states.
Emerald. Most precious stone in the beryl group. Brings calm by removing hidden fears. Helpful aid to medication.
Rubies are precious stones and a member of the corundum family (Al2O3). Rubies range in color from the classic deep red to pink to purple to brown. Rubies are extremely hard; only diamonds are harder.
Amethyst is a semi-precious stone, with a lovely purple color. It soothes, and brings calm, to help you rest and have a good night's sleep.
Aventurine ...
Nephrite is a semi-precious stone, a variety of jade (sometimes called greenstone). Two different minerals are known as jade, jadeite and nephrite.
Hyacinth is a semi-precious stone that is also known as jacinth. it is a lustrous orange-yellow, orange-red, or yellow-brown type of zircon. Hyacinth has a hardness of 7.5 and a specific gravity of 4.65.
Compared with other precious stones the emerald in its occurrence in nature is unique, for it is found in the rock in which it was formed.
The look of the 2 carat emerald diamond cut is subtle.3 carat & 5 carat emeralds have also brilliant clarity.
Jewelry that mimics precious stones and metals is important to the story, yet the beginnings of modern costume jewelry, jewelry that is intimately connected to fashion, is found in early twentieth century Paris.
Opal is a semi precious stone that has s a speckled and multi-colored iridescent appearance. Viewed in different lighting or at different angles, opals give off a somewhat rainbow effect of a multitude of colors. Opal also has a medium hardness or 5.
 See also: Precious, Stone, Jewel, Color, Gemstone
  
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