CaratHunter
Plans
Oval|Lab Grown|IGI

1.70ct J SI2 Oval Lab Grown Diamond

ID • J/SI2 • IGI LG451056578

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG451056578

Diamond specifications and retailer prices

From £638 GBP
$850 USD
As of October 29, 2026
Save £1,347 GBP (68%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,255 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 1.7ct lab-grown oval diamond

This 1.7ct lab-grown oval 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 LG451056578 or 451056578. Listed at 10 retailers as of October 26, 2026, with a 211% 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

1.70
Carat
J
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056578
Dimensions9.40 × 6.73 × 4.21 mm
L/W Ratio1.40
Girdle conditionFaceted
Culet sizePointed
Cert comments
undefined
Top View
9.40 mm6.73 mm1.70 ctJ / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056578
Side View
Table 57.0%Crown 36.5°Girdle: MED-VTKPavilion 40.7°Culet: NoneDepth 62.6%

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 29
Current: £3,255 GBP|Low: £638 GBP|High: £3,277 GBP|Avg: £1,526 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 21, 2026
Retailer 4£638 GBP
Retailer 2£869 GBP
Retailer 8£945 GBP
Retailer 9£972 GBP
Retailer 5£1,008 GBP
Retailer 11£1,440 GBP
Retailer 6£1,602 GBP
Retailer 7£1,889 GBP
Retailer 10£1,985 GBP
Retailer 3£2,256 GBP
MOH London£3,255 GBP

13 data points across 11 retailers

10 retailers£638 GBP to £1,985 GBP

A
Cheapest Retailer
-
£638 GBP
$850 USD
A
Retailer 2
-
£869 GBP
$1,157 USD
View
B+
Retailer 3
-
£945 GBP
$1,259 USD
View
B+
Retailer 4
-
£972 GBP
$1,295 USD
View
Final sale: no returns
Retailer 5
-
£1,008 GBP
$1,342 USD
View
Price last confirmed 17 days ago
B+
Retailer 6
-
£1,008 GBP
$1,342 USD
View
B
Retailer 7
-
£1,602 GBP
$2,133 USD
View
B
Retailer 8
-
£1,889 GBP
$2,516 USD
View
B
Retailer 9
-
£1,985 GBP
$2,644 USD
View
Most Expensive
MOH London
LG451056578 · Oct 21
£3,255 GBP
View
Price last confirmed 9 days ago
9 more retailers have this diamond
Prices start from £638 GBPSave up to £1,347 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 Oval
£638 GBP