The field test for diamond is hardness.
Try marking other rocks. Otherwise, carry the rock into a jeweler who can use a probe and tell you whether or not your rock is a raw diamond.
This depends entirely on the diamond in question.
Testing a raw diamond at home can be challenging without the proper equipment. One common method is using a diamond tester, which measures a diamond's thermal conductivity to determine if it's real. Alternatively, you can check for imperfections or inclusions under a jeweler's loupe, though this method is less reliable. Consulting a professional jeweler is the most recommended way to accurately test a raw diamond.
The normal test is to 'beep' it with a thermal diamond tester. This device measures how fast the material conducts heat and can thus tell if it is real diamond or not (diamond is the best heat conducting material at room temperature). Basically every jewelry store has one of these, so you can ask them to test it for you. Physically, if the stone appears to be clear, even though it's coloured -- and it is extremely hard, it's worth taking it in for testing. See below for photos of raw diamonds.
The field test for a raw diamond is 'extreme hardness'. Otherwise, pick up the stone and take it to a jeweler, who may be able to confirm that you have picked up a diamond and not another clear mineral.
Raw stones are mined from the earth, separated from the surrounding material, sorted/ graded and then sold/ brokered to diamond buyers. (Seventy-five percent of diamonds mined are employed in industry; only about 25% of mined diamonds are of gem quality.) Diamond buyers/ brokers then move the gem-quality stones to cutting operations, where the raw stones are evaluated for colour and clarity. Plans are developed to highlight the colour and clarity of each individual stone while preserving the highest carat weight. (About 60% of a raw stone's weight is lost in the cutting process.) Then the stones are cut and polished, and sold to brokers/jewelers who mount the finished diamonds into jewelry.
The proper words are raw diamond, raw stone, rough diamond, uncut diamond -- all are appropriate.
Your question is about a raw diamond. A raw diamond must be evaluated for its natural colour and clarity. Then you can work with a diamond cutter to estimate the value of a cut diamond that can be 'rescued' from the raw diamond. The diamond cutter may offer to purchase the raw stone, or work out another arrangement with you for its ultimate value. Typically more than 50% of the carat weight of a raw diamond is lost during the cutting process.
This depends entirely on the diamond in question.
The field test for a diamond stone is its extremehardness. Lacking any tool to test extreme hardness, take the raw stone to a jeweler, who can use a probe to confirm that the stone is or is not a diamond.
You're asking about a raw diamond, one that has not been cut or polished. In context, sometimes a raw diamond's "... eight corners are truncated by the eight faces of the octahedron." This is one description of a diamond's raw, crystalline form. You can read more about the geometric descriptions of raw diamonds, below.
The raw diamond of 19.5 carats weighs about 3900 milligrams. Remember, though that raw, gem-quality diamonds can lose about 60% of their weight when cut and polished.
A raw diamond looks like two square pyramids attached at the base.
The diamond cutter taught the intern how a diamond cuts diamond as they cut and polished the raw stone.
Industrial raw diamonds are much less expensive that gem-quality raw diamonds. You can visit the site, below, and look for the raw diamond that you want to buy.
You can click the links, below, to view photos of a raw diamond and of a polished diamond. Their are many diamonds that appear to look like their real. The best way to tell is to put the diamond in a bright light. If the diamond only gives off a little sparkle and shine it most likely is not real.
The differences between natural diamonds and lab-created diamonds are best determined by a trained and certified gemologist. even if it is damaged and has a rough edge. If the diamond is a raw diamond and your query is whether or not the stone is a diamond or not, the field test for diamond is hardness. A diamond rock will scratch everything.
examples of raw materials are Diamond, Suger and Aluminum.