A four carat diamond weights four carats.
In ounces, this stone would weigh about 0.03 or three one-hundredths of an ounce.
A 4 carat diamond ring would be ridiculously expensive. In the $100K mark I would expect. If someone is showing you their 4 carat engagement ring, it is probably cubic zirconia.
Every diamond is valued according to its cut, colour, carat weight and clarity.
If the diamond is cut, 4-point may refer to its weight, would would otherwise be expressed as .04 carat, or 4/100ths of a carat.
1/4 carat or smaller.
Every diamond is worth what someone will pay you for it. You can buy a 25 point diamond -- 25/100ths of a carat -- today at Blue Nile and spend about US$215. A four-point diamond is 4/100ths of a carat, meaning that it is very small for a diamond -- between 2 and 2.5MM at the girdle if the diamond is a round brilliant cut.
A carat, in relation to diamonds, is a unite of mass that is equal to 0.2 grams. Meaning a 4 carat diamond weighs just over .8 grams and an 8 carat diamond is 1.6 grams.
Carats are used to measure a diamond's weight. A jeweler can estimate the carat weight; a gemologist will remove the stone and weigh it, then give you a certificate that includes not only its weight, but its clarity, colour and the name and grade of the cut.
A diamond is valued by its cut, clarity, carat weight and colour.
The value of a diamond depends on its cut, colour, carat weight and its clarity. A local jeweler can answer your question. You can buy a round cut diamond of this weight today from Blue Nile and spend from about US$40,000 to about US$56,000. An investment-quality diamond -- with a higher clarity rating -- starts at about US$56,000.
Cut, colour, clarity and carat weight.
A diamond has four (4) properties: color, cut, clarity, and carat weight.
Cut, clarity, carat, and color.