Pit
A Pit is a small opening on the surface of the stone, usually looking like a pinpoint, but coming to the outside of the Diamond.
Polish Marks ...
Pit: A tiny opening, often looking like a white dot.
Point: A measurement in the weight of a diamond equal to 1/100 of a carat (e.g. 0.25 carats is equal to 25 points).
Pit: A tiny opening, often looking like a white dot.
Plotting Diagram - A schematic diagram included on the EGL USA Diamond Certificate that illustrates the facets (printed in black) of a diamond and the approximate location and type of ...
PIT - An indentation on the surface of a diamond, caused by a blow, knot or the opening of a cavity during cutting or polishing.
Pit
Tiny opening on the diamond present as a surface blemish and looking like a white spot.
Points ...
Open Pit Mining
Open-pit diamond mining, also known as "open-cast mining" (top of page, center) is a method of extracting rock and minerals from the earth by removal from a machine-dug open pit or burrow.
1.) The Pit Butte, Montana
2.) The Pit Butte, Montana
3.) The Pit Butte, Montana
TheImage Home ...
Above the pit, pea-sized pieces of demantoid are scattered across a piece of canvas in a spectacular display of newly dug treasure. We marvel at the scene, turning beautiful, crystal-clean demantoids in our fingers.
[3] Open Pit Mining
This mining can only be accomplished under the guidance of an experienced Gemologist.
The El Chino open-pit copper mine in New Mexico. See Copper extraction for the main article.
pit Type of mine where a large hole is dug in the ground to extract the valuable material. pitchy (pitchlike) luster Luster of a mineral that appears similar to tar.
Blemish, an defect in a gemstone found at the surface, such as a pit, nick, scratch, chip or even an extra facet where none should be. A blemish differs from an inclusion, which is internal to the gemstone.
Don't let your diamonds come in contact with chlorine bleach or other chemicals because they can pit or discolor the mounting.
Clean your diamonds regularly.
When the floor of the pit can be kept dry a few hours-and this is as a rule only possible in February and March-immense fires are lighted at the base of the stone.
The water filled pit is 100 feet wide and 800 feet long (figs. 12 and 13). The dumps cover an extensive area west and southwest of the open cut and tower over 120 feet high above the surrounding landscape.
In buying stones, it is well to remember you are entering the arena to pit your knowledge against the other man’s.
**Check the web: Get a moving panoramic view of the famous, "Lavender Pit" copper mine in Bisbee, Arizona at this site.
Other sources mention the original use of a plum pit gum (Prunus domestica domestica) as the gluing medium but this is uncertain. Cellini does not make any reference to the gum used, while he created beautiful artifacts with email en ronde bosse.
Operations will commence with an open pit mine, and despite the harsh climate, it is planned to operate year-round.
Azurite - 4900 level, Northwest Extension, 4.6cm x 6.6cm
Azurite - Morenci Open Pit, Former collections of Tom Potucek, Colorado School of Mines, 6.8cm x 5.0cm
Copper Handle - Gift from Dee Henry, 3.5cm x 9.5cm
Cuprite on Copper ...
Laser Drill Holes: a tiny tube made by a laser; the surface opening may resemble a pit, while the tube usually resembles a needle.
Needles: needle-shaped included crystals.
Pinpoints: areas of minute, dot-like inclusions.
Bobbing: Sand bobbing is a process used for polishing soft metals and removing scratches, pit marks and other imperfections without dragging the metal.
Bobbing Compound: A tripoli type compound used as a fine abrasive before polishing.
A tiny tube made by a laser. The surface opening may resemble a pit, while the tube usually looks needle-like.
Needle
A long, thin included crystal which looks like a tiny rod.
Term used in the GIA clarity-grading system for any nick, scratch, abrasion, pit, polish mark, graining or polish line on the surface of a polished diamond.
Brilliance ...
Stripping ratio
the ratio of the amount of waste material which must be removed in an open pit to allow one ton of ore to be mined
Sulphides
compounds of sulphur with other metallic elements ...
bench mining A mining method where they cut a slot going to the underground collection area in an open pit mine and blast the rock in the steps forcing the diamond-bearing gravel downward.
A place where diamonds are extracted from the ground, by either open cast or deep pit mining.
Mined ...
Because chemicals can damage
your jewelry, put your rings, earrings and necklaces on AFTER applying hair
spray, perfume and makeup. Avoid chlorine bleach, which can pit and damage
gems.
A place where gemstones are extracted from the ground by using various methods of mining like open cast, deep pit etc.
Mineral ...
There are two main varieties - 1. Sea Amber which is washed up along certain shores, especially the Baltic sea and the shores of Eastern England. 2. Pit amber which has been mined in various places e.g. Burma and Mexico.
 See also: Stone, Rough, Mineral, Color, Cut
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