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Radiant|Lab Grown|IGI

1.70ct D SI2 Radiant Lab Grown Diamond

D/SI2 • IGI LG797641301

Certificate IGI LG797641301

Diamond specifications and retailer prices

From $1,550 USD
As of October 28, 2026
3 retailers carry this diamond
Most expensive: $1,550 USD at Zales · As of October 28, 2026
View at Zales

About this 1.7ct lab-grown radiant diamond

This 1.7ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included) and certified by IGI LG797641301 or 797641301. Listed at 3 retailers as of October 28, 2026, with a relatively tight 0% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.70
Carat
D
Color
SI2
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG797641301
Dimensions7.81 × 5.99 mm
L/W Ratio1.30
Top View
7.81 mm5.99 mm1.70 ctD / SI2
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG797641301
Side View
Table 65.0%CrownGirdle: MediumPavilionCulet: NoneDepth 67.8%

Caratlytics Score

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C
Average
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Price History

Last verified: Oct 28
Current: $1,240 USD|Low: $1,240 USD|High: $1,550 USD|Avg: $1,426 USD
Retailer 1
Retailer 2
Zales
October 1, 2026
Retailer 1$1,240 USD
Retailer 2$1,550 USD
Zales$1,550 USD

2 data points across 3 retailers

3 retailers$1,550 USD to $1,550 USD

Retailer 1
-
$1,240 USD
Price last confirmed 8 days ago
C
Retailer 2
-
$1,550 USD
View
Most Expensive
C
Zales
528604737 · Oct 28
$1,550 USD
View
2 more retailers have this diamond
Prices start from $1,550 USD

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.

C
1.70ct Radiant
$1,550 USD