Marquise lab-grown diamonds
A marquise cut is a long boat-shaped brilliant that gives the largest face-up size per carat. Lab-grown stones cost far less per carat, so many buyers choose a larger size or a higher colour.
| Carat | Colour D-E | Colour F-G | Colour H-I |
|---|---|---|---|
| 0.5 ct | A$300 | A$270 | A$230 |
| 0.75 ct | A$420 | A$370 | A$320 |
| 1.0 ct | A$570 | A$510 | A$440 |
| 1.25 ct | A$730 | A$650 | A$560 |
| 1.5 ct | A$930 | A$830 | A$720 |
| 2.0 ct | A$1,350 | A$1,200 | A$1,000 |
| 2.5 ct | A$1,750 | A$1,550 | A$1,350 |
| 3.0 ct | A$2,250 | A$2,000 | A$1,700 |
| 4.0 ct | A$3,300 | A$2,950 | A$2,550 |
| 5.0 ct | A$4,600 | A$4,100 | A$3,550 |
Recommended proportions
| Length-to-width ratio | 1.75-2.25 |
|---|---|
| Table | 53-63 % |
| Depth | 58-62 % |
| Cut | Excellent / Ideal |
Guide ranges for an excellent-looking stone; we check them on every report before we offer you a diamond.
Questions buyers ask
Are lab-grown diamonds real diamonds?
Yes. A lab-grown diamond is pure crystallised carbon with the same hardness, refractive index and chemical structure as a mined diamond. Gem labs such as IGI and GIA grade them with the same colour, clarity and cut scales, and the report states that the stone is laboratory-grown.
How much cheaper is lab-grown than natural?
For the same size and quality, a lab-grown diamond usually costs a small fraction of a natural one. On our current price list a 1 carat round F-G VS lab-grown diamond is A$630 and a comparable GIA-graded natural diamond is A$7,850.
Which certificate comes with my diamond?
Lab-grown centre stones and loose stones come with an IGI report. Natural diamonds of 0.30 ct and above come with a GIA report. The report number is laser-inscribed on the girdle, and we send you the report before we charge.
Other shapes
Round · Oval · Emerald · Cushion · Princess · Pear · Radiant · Heart · Asscher