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Oval|Lab Grown|IGI

1.56ct G SI1 Oval Lab Grown Diamond

EX • G/SI1 • IGI LG818660685

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG818660685

Diamond specifications and retailer prices

From £955 GBP
$1,280 USD
As of October 31, 2026
10 retailers carry this diamond
Most expensive: £955 GBP at Brilliant Earth
View at Brilliant Earth

About this 1.56ct lab-grown oval diamond

This 1.56ct 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 LG818660685 or 818660685. Listed at 10 retailers as of October 31, 2026. 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

1.56
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818660685
Dimensions9.57 × 6.55 × 4.02 mm
L/W Ratio1.46
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.57 mm6.55 mm1.56 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818660685
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: £955 GBP|Low: £175 GBP|High: £970 GBP|Avg: £502 GBP|+1.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 5, 2026
Retailer 7£181 GBP
Retailer 10£200 GBP
Retailer 6£343 GBP
Retailer 4£363 GBP
Retailer 5£381 GBP
Retailer 3£477 GBP
Retailer 9£651 GBP
Retailer 11£683 GBP
Retailer 2£702 GBP
Retailer 8£812 GBP
Brilliant Earth£955 GBP

15 data points across 11 retailers

10 retailers

Retailer 1
-
£155 GBP
$208 USD
Price last confirmed 28 days ago
Retailer 2
-
£185 GBP
$248 USD
View
Price last confirmed 38 days ago
Retailer 3
-
£200 GBP
$268 USD
View
Price last confirmed 28 days ago
Retailer 4
-
£343 GBP
$459 USD
View
Price last confirmed 28 days ago
Retailer 5
-
£477 GBP
$639 USD
View
Price last confirmed 30 days ago
Retailer 6
-
£644 GBP
$863 USD
View
Price last confirmed 28 days ago
Retailer 7
-
£651 GBP
SGD 1,179 SGD
View
Price last confirmed 29 days ago
Retailer 8
-
£702 GBP
$940 USD
View
Price last confirmed 28 days ago
Retailer 9
-
£812 GBP
View
Price last confirmed 29 days ago
Most Expensive
B
Brilliant Earth
21492487A · Oct 31
£955 GBP
$1,280 USD
View
9 more retailers have this diamond

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
1.56ct Oval
£955 GBP