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Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold

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Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold

China Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold  supplier
Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold  supplier Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold  supplier Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold  supplier Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold  supplier

Large Image :  Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold

Product Details:

Place of Origin: China
Brand Name: Lanciajewelry

Payment & Shipping Terms:

Minimum Order Quantity: 3
Price: Negotiation
Packaging Details: pp bag
Delivery Time: 3-5 works day for stock items
Payment Terms: Western Union, T/T
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Detailed Product Description
Item Type: Gemstone Ring Ring Band: Cable
Main Stone: Ruby Side Stone: 12 Pcs Real Diamonds
Birthstone: July Ring Shape: Clover

 

 

Pear Shaped Natural Ruby Gemstone Genuine Diamond Ring Fine Jewellery

 

Item Specification:

 

Ring Infomation

Diamond Infomation

Ruby Infomation

Metal Type: Solid 18Kt Gold-Rose

Diamonds:Natural Diamonds

Ruby:Genuine 100% Natural

Approximate Weight: 1.96g-2.20g

Setting Type:Pave setting

Setting Type:Prong setting

Style: Diamond & Ruby ring

Diamond Weight: 0.078-0.082ct

Stone Weight:0.50ct-0.605ct

 

Ring Size: US 6, 6.5, 7, 7.5, 8

Cut: Round

Cut:Round

Metal Stamp:Au750

Clarity:SI

Clarity:VS

Stock Number:DF1300

Color:G-H

Dimensions:Approx 4mm

 

 

Pictrue Details:

 

Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold

 

Ladies 18k Gold Gemstone Rings Ruby And Diamond Ring White Gold

 

 

Ruby- Precious Stone

 

Characters

Of all the color-varieties of precious corundum the red, or ruby ("oriental ruby"), is the most highly prized. It is probably identical with the anthrax of Theuphrastus, and is one of the stones referred to in medieval times as carbuncle. It has all the general characters of corundum, and is only distinguished from other varieties by its' red color.

 

The tone of color differs in different specimens, being sometimes deep and intense ("masculine" ruby), sometimes pale and light ("feminine" ruby). The lighter shades vary from pale rose-red to reddish-white, some specimens being so faintly tinged with red as to appear almost colorless. The darker colors are pure red, carmine-red, or blood red; the red of the majority of rubies, however, has a more or less distinct tinge of blue or violet, this being especially noticeable in transmitted light. The shade of color which is most admired is the deep, pure carmine-red, or carmine-red with a slight bluish tinge. Burmese has compared this color to that of the blood of a freshly-killed pigeon, hence the references to such stones as being of "pigeon's-blood" red. The various shades of red of the ruby are remarkable in that they lose none of their beauty in artificial light, a statement, which cannot be made respecting any other precious stone of the same color.

 

The coloring of rubies is not always perfectly uniform, colorless layers being sometimes interposed between portions colored red. In such cases, the stone will often become uniformly colored throughout after heating. Provided the stone is gradually heated it may be raised to the highest temperatures with no fear of fracture. The interesting changes in color exhibited by certain gems when gradually heated and then allowed to cool have been already described. During cooling the ruby becomes first white and then green, finally regaining its original red color, so that in this stone the coloring matter is neither permanently changed nor destroyed by exposure to high temperatures. It is otherwise, however, with the sapphire, for this gem at a high temperature loses its beautiful blue and takes on a dull gray color. The red coloring-matter of the ruby is therefore certainly not organic in nature, as seems to be the case with those gems, which lose their color on heating. It is more likely to be some compound of chromium, an element whose presence has been detected in the analysis of some rubies. That the coloring of the ruby is due to chromium is also suggested by the fact that the color of the so-called "ruby" glass is obtained by adding a small amount of chromium oxide to the other constituents of the glass. M. Fremy also used the same substance for the production of the red color of his artificially prepared rubies. Some of the crystals produced by this investigator were partly red and partly blue, resembling in this respect certain natural rubies, which occur rarely in Burma.

 

The dichroïsm of deeply colored rubies is very noticeable; with the exception of stones of very pale color, a difference in the color; of every ruby can be observed when viewed in different directions. On looking through a dark-colored crystal of ruby, such as is illustrated in Fig. a-d, in a direction perpendicular to the basal planes, it will appear of an intense red color, either pure red or with a slight tinge of violet. If, however, the light received by the eye has passed through the crystal in a direction perpendicular to a prism face or edge, the stone will appear much lighter in color. On allowing the light, which has passed through the crystal in this direction to enter the dichroscope, the two images, in that position of the instrument in which the greatest difference in color is shown, will be one light, and the other dark red usually tinged with violet. In all other directions in which the light may travel, with one exception, the two images will be more or less differently colored. This exceptional direction is perpendicular to the basal planes and coincides with the direction of the optic axis. Along this direction the crystal is singly refracting, and the two images seen in the dichroscope are of the same deep red color as the crystal appears when viewed in this direction without the intervention of the dichroscope. The dichroïsm of the ruby affords a means whereby it may be distinguished with certainty from other red stones, such as spinel and the different varieties of garnet, which crystallize in the cubic system, and thus being singly refracting can show no dichroïsm.

 

The fact that the color of the ruby varies with the direction in which it is viewed, makes it necessary that the form of the cut gem should have a certain definite relation to that of the crystal in order to obtain the finest color-effect. The plane of the largest facet of the cut stone, namely, the table, must coincide as closely as possible in direction with the basal planes of the crystal in order to obtain the greatest depth in color of which the stone is capable. The greater the angle at which the table is inclined to the basal plane of the crystal the poorer will be the color-effect produced, and when the table is perpendicular to the basal plane, and therefore parallel to the prism faces of the crystal, the minimum color-effect is the result.

Some rubies show on the basal plane, or still more plainly on a cut and polished curved surface approximating to the basal plane in direction, a six-rayed star of glimmering reflected light. Such stones are known as star-rubies, or asteriated rubies, sometimes also as ruby cat's-eye. The appearance is similar to that seen in the star-sapphire, but, as a rule, less marked; it will be therefore considered in greater detail under sapphire.

 

 

 

 

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