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Oval|Lab Grown|IGI

1.59ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG578326356

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG578326356

Diamond specifications and retailer prices

From £225 GBP
$302 USD
As of October 29, 2026
Save £693 GBP (75%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £918 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.59ct lab-grown oval diamond

This 1.59ct lab-grown oval sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG578326356 or 578326356. Listed at 22 retailers as of October 29, 2026, with prices from £225 to £918, a £693 spread on the same certified stone. Brilliant Earth lists it at £918. 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

1.59
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG578326356
Dimensions9.22 × 6.60 × 4.14 mm
L/W Ratio1.40
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
9.22 mm6.60 mm1.59 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG578326356
Side View
Table 59.0%Crown 37.2°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: £918 GBP|Low: £145 GBP|High: £948 GBP|Avg: £490 GBP|-3.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 12£210 GBP
Retailer 4£222 GBP
Retailer 11£319 GBP
Retailer 7£377 GBP
Retailer 3£412 GBP
Retailer 13£415 GBP
Retailer 6£428 GBP
Retailer 2£455 GBP
Retailer 5£496 GBP
Retailer 8£698 GBP
Retailer 10£728 GBP
Retailer 9£909 GBP
Brilliant Earth£918 GBP

44 data points across 13 retailers

22 retailers£225 GBP to £918 GBP

Retailer 1
-
£182 GBP
$244 USD
Price last confirmed 32 days ago
Retailer 2
-
£211 GBP
$283 USD
View
Price last confirmed 17 days ago
Retailer 3
-
£211 GBP
$283 USD
View
Price last confirmed 35 days ago
Retailer 4
-
£222 GBP
$298 USD
View
Price last confirmed 31 days ago
A
Retailer 5
-
£225 GBP
$302 USD
View
Retailer 6
-
£225 GBP
$302 USD
View
Price last confirmed 20 days ago
Retailer 7
-
£225 GBP
$302 USD
View
Price last confirmed 28 days ago
A
Retailer 8
-
£267 GBP
HK$2,800 HKD
View
B+
Retailer 9
-
£319 GBP
$428 USD
View
A
Retailer 10
-
£377 GBP
€481 EUR
View
B+
Retailer 11
-
£412 GBP
$552 USD
View
B+
Retailer 12
-
£415 GBP
$556 USD
View
B+
Retailer 13
-
£428 GBP
View
B+
Retailer 14
-
£455 GBP
A$938 AUD
View
B+
Retailer 15
-
£496 GBP
$665 USD
View
Retailer 16
-
£698 GBP
$935 USD
View
Price last confirmed 12 days ago
Retailer 17
-
£725 GBP
$972 USD
View
Price last confirmed 21 days ago
Retailer 18
-
£725 GBP
$972 USD
View
Price last confirmed 30 days ago
B
Retailer 19
-
£728 GBP
$975 USD
View
B
Retailer 20
-
£764 GBP
SGD 1,383 SGD
View
Retailer 21
-
£909 GBP
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
7306134A · Oct 29
£918 GBP
$1,230 USD
View
21 more retailers have this diamond
Prices start from £225 GBPSave up to £693 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
1.59ct Oval
£225 GBP