If the stone is a round brilliant cut, it could weigh about one quarter of a carat. However, only a certified gemologist can give you the true weight of the stone, and certify it for you.
A 4mm diamond measures 4mm in at least one measurement.
If the diamond is an ideal emerald cut with these measurements, the diamond may weigh about one quarter of a carat. Otherwise, you have stated the diamond's 'big' size in measurements.
The diamond weighs 112 carats, or 0.790136 ounces.
A 2 mm round diamond weighs about .03 carats, so a 1.5 mm round diamond would be smaller than .03 carats. A .01 carat diamond is about as big as a grain of sand.
A 'big diamond' is one valued high enough that you are uncomfortable wearing it in public or leaving it in a jewelry box on your dresser. The value of this diamond means that you only wear it when you feel safe, and when you're not wearing it, you keep it in a safe. 'Big' is always relative.
A 4mm diamond measures 4mm in at least one measurement.
4mm its in the question
A round cut diamond weighing .25 carats measures 4.1mm at the girdle.
A round cut diamond weighing .25 carats measures 4.1mm at the girdle.
3 to 4mm
216 mm3
As wide as 4mm on a ruler
4mm is 0.15748032 of an inch.
4mm-6mm in inches = -2
4mm is smaller than 5mm
The Diamond as Big as the Ritz was created in 1922.
There are 25.4mm to one (1) inch, so there would be approximately six (6) 4mm beads per inch. If buying a 16" hank of 4mm bicone beads, you would be buying approximately 100 4mm beads.