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Oval|Lab Grown|IGI

1.71ct J SI1 Oval Lab Grown Diamond

ID • J/SI1 • IGI LG450028022

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG450028022

Diamond specifications and retailer prices

From $850 USD
As of October 31, 2026
Save $2,712 USD (76%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,457 USD at MOH London · As of October 21, 2026
View at MOH London

About this 1.71ct lab-grown oval diamond

This 1.71ct lab-grown oval sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG450028022 or 450028022. Listed at 11 retailers as of October 31, 2026, with a 319% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG450028022
Dimensions9.19 × 6.86 × 4.31 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD). Type IIa
Top View
9.19 mm6.86 mm1.71 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG450028022
Side View
Table 60.5%Crown 36.2°Girdle: MED-THKPavilion 41.5°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $5,457 USD|Low: $850 USD|High: $5,500 USD|Avg: $2,677 USD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 19, 2026
Retailer 7$850 USD
Retailer 6$1,638 USD
Retailer 11$1,783 USD
Retailer 12$1,834 USD
Retailer 5$1,840 USD
Retailer 8$1,901 USD
Retailer 13$2,070 USD
Retailer 3$2,553 USD
Retailer 9$2,988 USD
Retailer 2$3,277 USD
Retailer 10$3,562 USD
Retailer 4$5,442 USD
MOH London$5,457 USD

13 data points across 13 retailers

11 retailers$850 USD to $3,562 USD

A
Cheapest Retailer
-
$850 USD
B+
Retailer 2
-
$1,638 USD
View
B+
Retailer 3
-
$1,783 USD
View
B+
Retailer 4
-
$1,834 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,901 USD
View
Retailer 6
-
$1,901 USD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
$2,070 USD
View
B
Retailer 8
-
$2,988 USD
View
B
Retailer 9
-
$3,277 USD
View
B
Retailer 10
-
$3,562 USD
View
Most Expensive
MOH London
LG450028022 · Oct 21
$5,457 USD
£4,297 GBP
View
Price last confirmed 11 days ago
10 more retailers have this diamond
Prices start from $850 USDSave up to $2,712 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.

A
1.71ct Oval
$850 USD