The stone weights 545.67 carats.
One point eight carats.
Each diamond is valued according to its cut, clarity, carat weight and colour. Five diamonds weighing one carat, collectively weigh one carat.
Carat IS a metric unit of mass
You can buy a four-carat diamond today on Blue Nile and spend from US$30,000 and US$43,000. It will weigh about four carats depending on which one you choose.
Every diamond is valued by its cut, colour, clarity and carat weight. A diamond this large is rare: you may be able to find a comparable carat weight diamond in an auction catalog from Sothebys or Christies.
The weight of a carat is equivalent to 200 milligrams, so a two-carat diamond weighs 400 milligrams.
First, understand that if your 'one carat' diamond has '80 points', it may not weigh one carat. Then, take your diamond to a certified gemologist who can tell you 'how much' can be attributed to your diamond.
A four carat diamond weights four carats. In ounces, this stone would weigh about 0.03 or three one-hundredths of an ounce.
1 Carat = .2 grams = 100 points
One point eight carats.
A one-half carat diamond weighs 100 milligrams = 0.10 gram.
Seventy-five/one hundredths of a carat in gemstone weight equals three quarters of 0.00705479239 ounces, which is the ounce weight of one carat. In grams, a .75 carat diamond weighs three quarters of 0.2 grams. Can you do the math?
Each diamond is valued according to its cut, clarity, carat weight and colour. Five diamonds weighing one carat, collectively weigh one carat.
Carat IS a metric unit of mass
The fact that they are princess cut is irrelevant. 1 carat in gemology is equivalent to 0.2 grams. so 1.7ct (not kt) would be 0.34 grams.
There are 5 carats per gram. The answer is then 3/5 of a gram, or 0.6 grams.
One [gem-stone] carat = 0.0070547924 ounces; 200 milligrams or 0.2 grams or 1/5 of a gram of 20% of a gram.