Bruting
After a diamond is the height and width desired, it is crudely shaped into the round or other shape by rubbing it against another diamond on a high-speed lathe specially designed for the purpose.
Bruting: The rough is placed in a chuck on a lathe. While the rough stone rotates on the diamond lathe, a second diamond mounted on a dop is pressed against it, rounding the rough diamond into a conical shape.
BRUTING. Polishing diamonds by rubbing one against another.
BUBBLES. Small hollow specks in the body of a gem.
BUILT-UP RUBY. Reconstructed ruby.
Bruting
A method of rough-diamond fashioning by rubbing one diamond against another.
Cabochon
A gemstone with an unfacetted domed form. The oldest form of gem cutting.
Bruting - Bruting is the initial shaping of a rough gemstone.
Burnishing - Burnishing is a polishing method that magnifies the shine and luster of a metal by combining friction and compression without eliminating any metal.
Bruting
Bruting is the process of rounding a diamond to form its girdle. This is usually done by grinding one diamond against another on a rotating wheel. It is also known as girdling or rounding.
Bubble ...
bruting See bruted girdle.
burnished girdle A polishing effect without faceting that is accomplished by letting up on the pressure of the bort (industrial diamond) on the diamond being girdled.
top of page ▲ ...
Bruting
Bruting is the first process of cutting a diamond by shaping its girdle.
Bubbles
Bubbles can be found in glass, resins, and rarely in minerals. Bubbles are a good indication that a stone is glass, or an imitation gemstone.
BRUTING
Bruting is the first step in cutting a diamond. Bruting involves shaping the girdle, which gives the stone its basic shape.
BUBBLES ...
3) Bruting: The job of the "bruter" is to create the face up outline of the gem: round, oval, marquis, etc. The time honored technique for doing this involves using one diamond to grind another and is done mostly by eye using a lathe-like apparatus.
Bruting
Cutting or girdling. Process involves grinding one diamond against another to give it its basic shape.
Carat weight ...
Bruting
The process of rounding a diamond to form its girdle, customarily done by grinding one diamond against another on a rotating wheel. Some American retailers call this girdling. It may also be called rounding.
Burn, Burnt, Burned ...
Bruting: The first step in cutting a diamond. Gives the gem it's basic shape.
Bubbles: Tear shaped gases that are captured in a glass stone.
Burnish Setting: A setting where the stone is set flush with the setting without prongs to hold it.
Power driven bruting (girdling) machine for cutting diamonds patented in England
First commercial opal mine opened in Australia
1892
Vogue magazine founded in the USA
Marcus & Co. formerly Jaques & Marcus, established in New York ...
Preforming usually involves cutting (not cleaving) with a diamond-impregnated saw, followed by further rough-shaping by a process known as bruting.
Thus, the table-cut (below) diamond was formed by grinding down the top octahedral point to form a square facet using a recently discovered technique called bruting. This table facet was then finished off by polishing with diamond powder.
Then, the girdler uses a process called bruting that grinds away the stone's edges and provides its outline shape. Faceting follows, usually in two steps.
Next, bruting grinds away the edges, providing the outline shape (for example, heart, oval or round) for the gem.
The Cutting process is the actual Sawing, Bruting and Blocking of the rough rock into a dazzling Gemstone. Which leads us into.
The History of the Brilliant Cut ...
Also fringes and cracks along the girdle are counted as cleavage cracks; these were caused by careless bruting of the rough diamond (Fig 16 and 17).
Fig 16 Cleavage cracks along the girdle (40 x) ...
The stone is usually held by hand against the edge of the slitting disc, but in modern times mechanical holders have been introduced. After a stone has been so split, bruting is not needed before faceting.
Polished Girdle A girdle which had been finely ground to a polished finish instead of the older and simpler matt finish left by bruting.
rapid and it leaves the stone (which is reversed to make the opposite side) round in form and with a rounding top and cone shaped back. Stones of fancy shape, such as square, or cushion shape, have to be formed in part by hand rubbing or "bruting" as ...
 See also: Diamond, Rough, Facet, Shape, Cut
  
|
RSS
