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Round|Lab Grown|IGI

1.70ct J SI2 Round Lab Grown Diamond

EX • J/SI2 • IGI LG451057285

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057285

Diamond specifications and retailer prices

From $1,184 USD
As of October 29, 2026
Save $3,253 USD (73%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,437 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.7ct lab-grown round diamond

This 1.7ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451057285 or 451057285. Listed at 10 retailers as of October 29, 2026, with prices from $1,184 to $4,437, a $3,253 spread on the same certified stone. MOH London lists it at $4,437. 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

1.70
Carat
J
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057285
Dimensions7.73 × 7.77 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.73 mm7.77 mm1.70 ctJ / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057285
Side View
Table 59.5%Crown 33.3°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 59.0%

Caratlytics Score

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

Price History

Last verified: Oct 29
Current: $4,437 USD|Low: $1,210 USD|High: $4,467 USD|Avg: $2,223 USD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 2$1,210 USD
Retailer 4$1,288 USD
Retailer 5$1,326 USD
Retailer 7$1,955 USD
Retailer 3$2,179 USD
Retailer 6$2,707 USD
Retailer 8$3,072 USD
MOH London$4,437 USD

11 data points across 8 retailers

10 retailers$1,184 USD to $4,437 USD

A
Cheapest Retailer
-
$1,184 USD
A
Retailer 2
-
$1,210 USD
View
A
Retailer 3
-
$1,288 USD
View
B+
Retailer 4
-
$1,326 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,374 USD
View
Retailer 6
-
$1,374 USD
View
Price last confirmed 17 days ago
B
Retailer 7
-
$2,179 USD
View
B
Retailer 8
-
$2,575 USD
View
B
Retailer 9
-
$2,707 USD
View
Most Expensive
B
MOH London
LG451057285 · Oct 29
$4,437 USD
£3,494 GBP
View
9 more retailers have this diamond
Prices start from $1,184 USDSave up to $3,253 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
1.70ct Round
$1,184 USD