Smoky Quartz Faceted Beads Bracelet

Smoky Quartz Faceted Beads Bracelet
Smoky Quartz Faceted Beads Bracelet

A797-JEBR

Taiwan
(L) 12cm
38g (~1oz)
 Faceted  Smoky Quartz  Quartz
A797-JEBR

Faceted

Facets are flat faces on geometric shapes. The organization of naturally occurring facets was key to early developments in crystallography, since they reflect the underlying symmetry of the crystal structure. Gemstones commonly have facets cut into them in order to improve their appearance.

Of the many hundreds of facet arrangements that have been used, the most famous is probably the round brilliant cut, used for diamond and many colored gemstones. This arrangement of 57 facets was calculated by Marcel Tolkowsky in 1919. Slight improvements have been made since then, including the addition of a 58th facet (a culet) on the bottom of the stone. Since this is calculated to show maximum brilliance, round diamonds are rarely cut in any other arrangement, although recently the Princess cut is becoming popular. Other cuts, including "rose" cuts, are most typically found in antique jewelry. See diamond cuts for an in-depth discussion and diagrams of various shapes and ways of cutting faceted stones.

The art of cutting a gem with facets is a very precise activity. The aim with a faceted cut is to produce an article that sparkles with internally reflected light, and that shows off the "fire" of the stone. Accordingly, only transparent or translucent stones are usually faceted.

The angles between each facet are precisely calculated. As the aim is to maximise the effect of the internal reflections, these angles depend on the refractive index of the material. This means that although the name and general shape of a particular cut may be the same between different materials, the actual angles will be slightly different, for the maximum effect.

Thus, although cubic zirconia and rock crystal may look similar to diamond, and all can be cut in a round brilliant cut, the angles must be different to produce the same optical effects. Additionally, as diamond has a refractive index significantly higher than the other natural transparent stones, it can have a much greater sparkle than other materials.

While some facets can be cut by cleavage, specialised machines are used for cutting arbitrary facets. These consist of two main features:

a flat abrasive, usually diamond dust of precise size bonded onto a metal disk (called 'laps') or carried by an oily fluid on a smooth metal or ceramic disk, and
a system for holding a stone onto the disk at a precise angle and position.
This usually requires the stone to be attached to a holder or dop, which is then placed in an indexed vice. This allows progressively finer abrasives to be used without disrupting the orientation of the stone. The final abrasive must be smaller than the wavelength of light, so that the scratches it creates are invisible. Modern machines tend to have indexed gears for moving the stone, so that rotating the stone to cut the next facet can be more precisely controlled.

An older machine called the jamb peg faceting machine used wooden dop sticks of precise length. By placing one end into one of many precisely located holes in the jamb peg, the other end, with the stone, could be precisely placed onto the lap. These machines took considerable skill to use effectively.

Much less commonly, faceters use cylindrical machines, which leave concave facets. This technique is most noticeably used around the gem's girdle.


Smoky Quartz

A very common, coarse-grained variety of the silica mineral that ranges in colour from nearly black through smoky brown. No distinct boundary exists between smoky and colourless. Its abundance causes it to be worth considerably less than either or. Heating bleaches the
stone, the colour sometimes passing through yellow; these yellow pieces are often sold as. Crystals of the mineral frequently contain inclusions of gas (carbon dioxide), liquid (often both water and liquid carbon dioxide), or solids (rutile). Smoky from Mount Cairngorm, Scotland, is known as cairngorm and is a favourite ornamental stone in Scotland, where it is worn in brooches with Highland costume. Its properties are those of other stones. Today, the vast majority of smoky is mined in Brazil, but it is found in most of the major gem producing nations.

Smoky is quite often sold in the trade as smoky. 99% of the time a gem offered as smoky is actually this variety of. Since is a separate mineral, this type of name can be confusing and should be clearly disclosed as to which gem is actually being presented, since also occurs in a brown color.


  • $1370


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Blue Topaz Beads Bracelet

Blue Topaz Beads Bracelet

Top blue topaz hand bead braceletTop blue topaz is a beautiful gemstone that symbolizes peace and friendship. Topaz can help enhance expression and persuasiveness, enhance personal confidence, and make people calm things. It can improve the diseases of the respiratory tract and trachea, balance and regulate the function of lymph glands.The ancient Greeks believed that topaz gave people power. During the European Renaissance (from the 14th century to the 17th century), people thought that rubble could break the curse and eliminate anger. For hundreds of years, many people in India have believed that topaz worn on the heart can prolong life and ensure beauty and wisdom.The ancient Egyptians believed that the golden topaz symbolized the life-giving sun god. Wearing it can be blessed by the sun god, and it is also the guardian stone of beauty and health.The ancient Greeks regarded topaz as a "strength stone". It had magical power and was a special medicine for treating liver, kidney, and edema. Eastern psychics and wizards also used topaz as a god stone when communicating with the underworld.It is said that on a sleepless night, you can sleep peacefully by wearing a topaz ring and putting your hand on your forehead. There was also a record in medieval ancient books that sleeping with topaz under the pillow can quickly restore your strength. The next day Wake up early in the morning and feel energetic. Although there is no medical confirmation of this statement, friends who are interested may wish to try.

$29380

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