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Round|Lab Grown|IGI

1.70ct J SI2 Round Lab Grown Diamond

EX • J/SI2 • IGI LG445038292

Shape and cutting style on the report: Round brilliant

Certificate IGI LG445038292

Diamond specifications and retailer prices

From £702 GBP
$940 USD
As of October 30, 2026
Save £2,597 GBP (79%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,298 GBP at MOH London · As of October 27, 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 LG445038292 or 445038292. Listed at 10 retailers as of October 27, 2026, with prices from £702 to £3,298, a £2,597 spread on the same certified stone. MOH London lists it at £3,298. 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
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG445038292
Dimensions7.74 × 7.72 × 4.62 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.74 mm7.72 mm1.70 ctJ / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG445038292
Side View
Table 59.5%Crown 32.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 59.8%

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 30
Current: £3,298 GBP|Low: £702 GBP|High: £3,334 GBP|Avg: £1,588 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2£702 GBP
Retailer 4£961 GBP
Retailer 5£990 GBP
Retailer 8£1,109 GBP
Retailer 7£1,459 GBP
Retailer 3£1,626 GBP
Retailer 6£2,020 GBP
Retailer 9£2,293 GBP
MOH London£3,298 GBP

10 data points across 9 retailers

10 retailers£702 GBP to £3,298 GBP

A
Cheapest Retailer
-
£702 GBP
$940 USD
B+
Retailer 2
-
£884 GBP
$1,184 USD
View
B+
Retailer 3
-
£961 GBP
$1,288 USD
View
B+
Retailer 4
-
£990 GBP
$1,326 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,025 GBP
$1,374 USD
View
Retailer 6
-
£1,025 GBP
$1,374 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
£1,626 GBP
$2,179 USD
View
B
Retailer 8
-
£1,922 GBP
$2,575 USD
View
B
Retailer 9
-
£2,020 GBP
$2,707 USD
View
Most Expensive
B
MOH London
LG445038292 · Oct 27
£3,298 GBP
View
9 more retailers have this diamond
Prices start from £702 GBPSave up to £2,597 GBP

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
£702 GBP