1.78ct F SI1 Oval Lab Grown Diamond
ID • F/SI1 • IGI LG779671606
Shape and cutting style on the report: Oval brilliant
Certificate IGI LG779671606
Diamond specifications and retailer prices
About this 1.78ct lab-grown oval diamond
This 1.78ct lab-grown oval sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG779671606 or 779671606. Listed at 16 retailers as of October 28, 2026, with prices from $235 to $1,290, a $1,055 spread on the same certified stone. Brilliant Earth lists it at $1,290. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.
The 4Cs
Specifications
Caratlytics Score
How it works →16 retailers
Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.
Similar diamonds
- 1.78ct OvalF/SI1from $392As of October 30, 2026
- 1.79ct OvalF/SI1from $513As of October 31, 2026
- 1.8ct OvalF/SI1from $1,330As of October 29, 2026
- 1.76ct OvalF/SI1from $1,610As of October 29, 2026
- 1.82ct OvalF/SI1from $434As of October 30, 2026
- 1.85ct OvalF/SI1from $213across 9 retailersAs of October 29, 2026
- 1.85ct OvalF/SI1from $857across 2 retailersAs of October 30, 2026
- 1.7ct OvalF/SI1from $1,500As of October 29, 2026