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Technical terms of Diamonds

The gemstone properties listed below are for rounded, maximum quality gemstones. Non-rounded gem stones may have dissimilar effects.

Acidising:

refers to the action of diamonds with acids (usually hot) to clean up after cutting or after mining, mainly to remove oxides or shining residues from surface cracks. .

A jour :

is a kind of diamond increase that exposes the tent to the light and is used in the majority of modern mounts, unlike previous closed locations.

Baguette:

refers to a diamond cut in the form of a fine bar, sometimes pointed at one end. It was named after the lengthy French bread loiter.

Baton:

is an additional name for a baguette.

Bedrock:

is the hard rock found in places of grates, deposits, soil, sand and so on.

Bezel facets:

happen when the cross-cutter creates the four top curve facets into eight.

Bicycle tyre:

refers to a thick strap.

Blocking:

is locating on the 16 main surfaces by the cross-cutter.

Blue ground:

is the miner's given name for the unoxidised kimberlite in a cylinder or new kimberlitic deposit.

Blue-white:

is a puzzling word often mistakenly applied. A blue-white sandstone should have a pale hint of blue, still though the report is generally proposed to mean colourless. Occasionally it is applied to stones with a faded tinge of yellow.

Boart:

is an extremely low-grade diamond appropriate only for industrialized use. It is also spelt bort, boort and bortz.

Brillianteerer:

is an experienced person liable for the last stages of placing on and polishing the 40 sides after the cross-cutter's effort. It is also predicted brilliandeer.

Brilliance:

is the strength of the white light as a diamond is appeared at in the face-up location.

Bruting:

is a new name for cutting to fashion the belt sketch of a brilliant cut.

Calibré cut:

refers to stones that have been cut to average dimensions for trouble-free setting into normal mounts.

Carat:

is the standardised part of burden for gemstones. One carat is equivalent to 0.20 of a gram.

Clean:

is used to express a diamond that has no eagerly visible insertions, grade SI and above.

Cleavage:

refers to the resemblance of a shape to separate along the grain parallel to one of its octahedral features. Moreover it is a term useful to irregular diamonds that have at some time been sliced from a larger stone.

Cleaver:

is the skillful person who chops a diamond into two parts.

Closed culet:

is the quick point at the base of the pavilion of a brilliant cut, or carving knife edge on an emerald-cut sandstone.

Cross-cutter:

is the trained person who crushes and polishes the first 16 facets on a diamond.

Crown:

is the superior component of a polished stone above the strap.

C.S.O.:

is the Central Selling Organisation which distributes regarding 80 per cent of the world's irregular gem quality diamonds.

Culet:

refers to awfully small facet on the base of the pavilion, matching to the table. It is also predicted to collet and culette.

Cut:

is the shape into which an uneven diamond is cut and polished.

Cutter or bruter:

makes the rough diamond in a circle before it is faceted.

Diamond paper:

is a new name for the parcel paper.

Diamond parcel paper:

is the specifically crinkled paper in which a diamond is or diamonds are detained for moving, or transporting.

Dispersion:

explains the method a diamond smashes up a beam of white light into colour.

Dop:

refers to the container used for a diamond that is being refined. A diamond is held in a join dop by link and in an automatic dop by metal jaws.

Extraction:

describes the procedure of eliminating diamonds from ponder.

Extra facet:

is an additional small surface normally useful to eradicate a small mark most frequently on or subsequent to the girdle.

Faceted girdle:

refers to a belt on which small sides have been polished to recover the brilliance of the diamond.

Face up:

is the location of a diamond with the table of the rock facing the spectator.

Fancies:

are pleasantly coloured diamonds.

Fancy:

is a diamond of a good-looking colour other than white that is appropriate for gem use.

Fire:

refers to the broken colours seen when a properly cut diamond is enthused, resulting from its diffusion.

Flute:

is a slight paper used to line up the inside of a diamond package paper.

Full-cut brilliant:

is the proper name for a brilliant-cut diamond with 56 features plus table and culet.

Girdle:

is a class of rim at the widest division of a diamond by which it is usually set. It is the consequential circumference of the adjacent cap and pavilion angles at the widest element of the stone.

Girdling:

explains the method a rough diamond is curved. It is also a new name for cutting and bruting.

Grader:

is the experienced person who divides polished diamonds into dimensions and quality marks by simplicity, colour and precision of cut.

Grain:

is a name used by shears and polishers to portray the noticeable evidence of the gemstone structure of a diamond, and will regularly determine their process.

Loose diamond:

is an unmounted, elegant diamond.

Lustre:

refers to the worth of a shell in reflected light. The lustre of a rhombus is typically explained as admantine lustre.

Mêlée:

are rough stones and forms under two carats and used freely for small polished diamonds.

Mixed-cut:

is the integration of two dissimilar cuts for one diamond, such as a dazzling cut crown and step-cut porch.

Mount or mounting:

is the division of jewellery into which a mineral is set.

Natural:

is branch of the natural shell of a rough diamond missing on the girdle by the cutter determined for greatest weight maintenance.

Navette:

is one more name for a marquise.

Near-gem:

is a value of rough diamonds involving gem and industrial.

Octagon:

word illustrates the method of adding up the eight main surfaces to the top and bottom of a stone, which creates its table octagon-shaped.

Open culet:

is better than normal culet.

Open table:

is superior than normal facet.

Open cast or open pit:

describes mining from the shell.

Opening a diamond:

means clean a window on a rough stone to see within it.

Pavilion:

is the base part of a cultured diamond below the girdle.

Pipe:

refers to a roughly funnel-shaped, usually extrusion of volcanic rock that may or may not contain diamonds.

Point:

is the hundredth of a carat, therefore 0.72 carats equal 72 points.

Polished girdle:

refers to a girdle that has been polished but not faceted.

Quality:

measures the degree of excellence of a diamond by its weight, colour, clarity and (polished) its perfection of cut.

Rough:

is the name specified to diamonds earlier than they are cut.

Sawyer:

is the expert person who see diamonds.

Sawable:

are the rough diamonds that can be separated by sawing.

Scaife:

is also implied scaive or scaif, and refers to the horizontal phonograph or grinding table on which a rhombus is refined.

Scintillation:

refers to the blinking and flashing sparkle of a diamond when it motivated under light. A diamond is constantly more beautiful in action because its scintillation depends upon the quantity of facets observable to the eye when the diamond shifts.

Set:

is a diamond or added stone set in a mount.

Skin:

is the ordinary surface of the unsophisticated diamond.

Sorter:

is the skilled person who divides rough diamonds into volumes and grades of quality by shape, clarity, and colour.

Star facets:

are the eight triangular facets about the table of a diamond that creates its star-shaped.

Table:

is the huge facet on the top of the diamond's cap.

Treated:

explains a polished diamond that has been distorted to change its form, eg by false colouration, that is, irradiation.

Window:

is the surface polished on a rough diamond in organize to see surrounded by it.