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Round|Lab Grown|IGI

1.59ct H SI1 Round Lab Grown Diamond

GD • H/SI1 • IGI LG720547065

Shape and cutting style on the report: Round brilliant

Certificate IGI LG720547065

Diamond specifications and retailer prices

From £173 GBP
$232 USD
As of October 29, 2026
Save £819 GBP (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £993 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.59ct lab-grown round diamond

This 1.59ct lab-grown round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG720547065 or 720547065. Listed at 14 retailers as of October 29, 2026, with prices from £173 to £993, a £819 spread on the same certified stone. Brilliant Earth lists it at £993. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.59
Carat
H
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG720547065
Dimensions7.54 × 7.52 × 4.40 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.54 mm7.52 mm1.59 ctH / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG720547065
Side View
Table 59.0%Crown 34.7°Girdle: MediumPavilion 40.7°Culet: LargeDepth 58.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £993 GBP|Low: £166 GBP|High: £1,030 GBP|Avg: £456 GBP|-3.6%
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
Retailer 14
Retailer 15
October 31, 2026
Retailer 11£173 GBP
Retailer 13£201 GBP
Retailer 5£215 GBP
Retailer 12£215 GBP
Retailer 2£358 GBP
Retailer 3£364 GBP
Retailer 7£381 GBP
Retailer 15£405 GBP
Retailer 6£413 GBP
Retailer 14£467 GBP
Retailer 9£511 GBP
Retailer 10£562 GBP
Retailer 4£690 GBP
Retailer 8£865 GBP
Brilliant Earth£993 GBP

23 data points across 15 retailers

14 retailers£173 GBP to £993 GBP

A
Cheapest Retailer
-
£173 GBP
$232 USD
A
Retailer 2
-
£201 GBP
$269 USD
View
A
Retailer 3
-
£215 GBP
$288 USD
View
B+
Retailer 4
-
£215 GBP
$288 USD
View
B+
Retailer 5
-
£358 GBP
€457 EUR
View
B+
Retailer 6
-
£364 GBP
$488 USD
View
B+
Retailer 7
-
£405 GBP
$543 USD
View
B+
Retailer 8
-
£467 GBP
$626 USD
View
B+
Retailer 9
-
£511 GBP
$685 USD
View
B+
Retailer 10
-
£562 GBP
$753 USD
View
Retailer 11
-
£662 GBP
$887 USD
View
Price last confirmed 45 days ago
B+
Retailer 12
-
£690 GBP
$925 USD
View
B+
Retailer 13
-
£865 GBP
View
Most Expensive
B+
Brilliant Earth
17383081A · Oct 31
£993 GBP
$1,330 USD
View
13 more retailers have this diamond
Prices start from £173 GBPSave up to £819 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 Round
£173 GBP