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Oval|Lab Grown|IGI

1.70ct G SI1 Oval Lab Grown Diamond

ID • G/SI1 • IGI LG506191341

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG506191341

Diamond specifications and retailer prices

From £873 GBP
$1,170 USD
As of October 30, 2026
Save £1,734 GBP (67%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,835 GBP at NZ Jewellers · As of October 31, 2026
View at NZ Jewellers

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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG506191341 or 506191341. Listed at 12 retailers as of October 30, 2026, with a 199% 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG506191341
Dimensions9.26 × 6.46 × 4.24 mm
L/W Ratio1.43
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
9.26 mm6.46 mm1.70 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG506191341
Side View
Table 61.5%Crown 37°Girdle: STK-VTKPavilion 41.3°Culet: NoneDepth 65.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,127 GBP|Low: £873 GBP|High: £4,377 GBP|Avg: £2,090 GBP|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 2£873 GBP
Retailer 5£1,304 GBP
Retailer 8£1,460 GBP
Retailer 6£1,513 GBP
Retailer 9£1,638 GBP
Retailer 1£2,127 GBP
Retailer 7£2,375 GBP
Retailer 4£2,608 GBP
Retailer 3£4,343 GBP

41 data points across 9 retailers

12 retailers£873 GBP to £2,608 GBP

B+
Cheapest Retailer
-
£873 GBP
$1,170 USD
B
Retailer 2
-
£1,304 GBP
$1,747 USD
View
B
Retailer 3
-
£1,419 GBP
$1,901 USD
View
B
Retailer 4
-
£1,460 GBP
$1,956 USD
View
Final sale: no returns
Retailer 5
-
£1,513 GBP
$2,027 USD
View
Price last confirmed 19 days ago
B
Retailer 6
-
£1,513 GBP
$2,027 USD
View
B
Retailer 7
-
£1,638 GBP
$2,195 USD
View
B
Retailer 8
-
£2,127 GBP
View
B
Retailer 9
-
£2,375 GBP
$3,182 USD
View
B
Retailer 10
-
£2,608 GBP
$3,494 USD
View
Most Expensive
NZ Jewellers
56e7f642-8e59-448f-a140-3073ce85b44f · Oct 31
£2,835 GBP
$3,799 USD
View
Price under review
10 more retailers have this diamond
Prices start from £873 GBPSave up to £1,734 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.

B+
1.70ct Oval
£873 GBP