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Heart|Lab Grown|IGI

1.59ct F SI1 Heart Lab Grown Diamond

ID • F/SI1 • IGI LG825687255

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG825687255

Diamond specifications and retailer prices

From £176 GBP
As of November 6, 2026
Save £669 GBP (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £844 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.59ct lab-grown heart diamond

This 1.59ct lab-grown heart sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG825687255 or 825687255. Listed at 14 retailers as of November 6, 2026, with prices from £176 to £844, a £669 spread on the same certified stone. Brilliant Earth lists it at £844. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.6°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825687255
Dimensions8.27 × 6.94 × 4.89 mm
L/W Ratio1.19
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.27 mm6.94 mm1.59 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825687255
Side View
Table 67.0%Crown 30.6°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 59.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £844 GBP|Low: £152 GBP|High: £1,315 GBP|Avg: £450 GBP|-35.8%
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
November 6, 2026
Retailer 13£159 GBP
Retailer 7£176 GBP
Retailer 12£185 GBP
Retailer 5£197 GBP
Retailer 2£248 GBP
Retailer 8£335 GBP
Retailer 6£356 GBP
Retailer 4£390 GBP
Retailer 9£513 GBP
Retailer 3£634 GBP
Retailer 10£634 GBP
Retailer 11£791 GBP
Brilliant Earth£844 GBP

41 data points across 13 retailers

14 retailers£176 GBP to £844 GBP

Retailer 1
-
£159 GBP
Price last confirmed 15 days ago
A
Retailer 2
-
£176 GBP
View
Final sale: no returns
Retailer 3
-
£185 GBP
View
Price last confirmed 14 days ago
Retailer 4
-
£197 GBP
View
Price last confirmed 13 days ago
A
Retailer 5
-
£220 GBP
View
A
Retailer 6
-
£248 GBP
View
B+
Retailer 7
-
£335 GBP
View
A
Retailer 8
-
£356 GBP
View
B+
Retailer 9
-
£390 GBP
View
Price last confirmed 8 days ago
B
Retailer 10
-
£513 GBP
View
Retailer 11
-
£634 GBP
View
Price last confirmed 13 days ago
B
Retailer 12
-
£634 GBP
View
Retailer 13
-
£791 GBP
View
Price last confirmed 13 days ago
Most Expensive
B
Brilliant Earth
20868368A · Nov 6
£844 GBP
$1,130 USD
View
13 more retailers have this diamond
Prices start from £176 GBPSave up to £669 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 Heart
£176 GBP