CaratHunter
Plans
Cushion|Lab Grown|IGI

1.71ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG551273812

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG551273812

Diamond specifications and retailer prices

From €374 EUR
$419 USD
As of October 25, 2026
4 retailers carry this diamond
Most expensive: €1,079 EUR at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 1.71ct lab-grown cushion diamond

This 1.71ct lab-grown cushion 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 LG551273812 or 551273812. Listed at 4 retailers as of October 25, 2026. 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

1.71
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle38.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG551273812
Dimensions7.82 × 6.52 × 4.46 mm
L/W Ratio1.20
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.82 mm6.52 mm1.71 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG551273812
Side View
Table 59.0%Crown 36.1°Girdle: MED-STKPavilion 38.5°Culet: NoneDepth 68.4%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 25
Current: €1,079 EUR|Low: €138 EUR|High: €1,801 EUR|Avg: €844 EUR|-3.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 18, 2026
Retailer 6€205 EUR
Retailer 4€374 EUR
Retailer 7€697 EUR
Retailer 5€742 EUR
Retailer 2€952 EUR
Brilliant Earth€1,079 EUR
Retailer 3€1,658 EUR

15 data points across 7 retailers

4 retailers€374 EUR to €1,079 EUR

Retailer 1
-
€374 EUR
$419 USD
Price last confirmed 8 days ago
Retailer 2
-
€742 EUR
$832 USD
View
Price last confirmed 7 days ago
Retailer 3
-
€952 EUR
£841 GBP
View
Price last confirmed 13 days ago
Most Expensive
Brilliant Earth
6431380Y · Oct 26
€1,079 EUR
$1,210 USD
View
Price last confirmed 7 days ago
3 more retailers have this diamond

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.

B
1.71ct Cushion
€374 EUR