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Heart|Lab Grown|IGI

0.81ct D SI1 Heart Lab Grown Diamond

EX • D/SI1 • IGI LG825602512

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG825602512

Diamond specifications and retailer prices

From £325 GBP
$435 USD
As of October 30, 2026
Save £637 GBP (66%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,155 GBP at Taylor and Hart · As of October 29, 2026
View at Taylor and Hart

About this 0.81ct lab-grown heart diamond

This 0.81ct lab-grown heart sits in the just-under-one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG825602512 or 825602512. Listed at 5 retailers as of October 29, 2026, with a 196% 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

0.81
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.1°
Pavilion angle38.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825602512
Dimensions5.66 × 6.51 × 3.67 mm
L/W Ratio1.15
Girdle conditionFaceted
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
5.66 mm6.51 mm0.81 ctD / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG825602512
Side View
Table 64.0%Crown 36.1°Girdle: MED-STKPavilion 38.2°Culet: NoneDepth 56.4%

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: £456 GBP|Low: £205 GBP|High: £1,155 GBP|Avg: £564 GBP|+16.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Taylor and Hart
October 31, 2026
Retailer 5£205 GBP
Retailer 2£325 GBP
Retailer 4£344 GBP
Retailer 1£456 GBP
Retailer 3£962 GBP
Taylor and Hart£1,155 GBP

39 data points across 6 retailers

5 retailers£325 GBP to £962 GBP

B+
Cheapest Retailer
-
£325 GBP
$435 USD
B
Retailer 2
-
£344 GBP
HK$3,600 HKD
View
B
Retailer 3
-
£456 GBP
View
B
Retailer 4
-
£962 GBP
View
Most Expensive
Taylor and Hart
LPDT8CJ · Oct 29
£1,155 GBP
$1,548 USD
View
Price under review
4 more retailers have this diamond
Prices start from £325 GBPSave up to £637 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+
0.81ct Heart
£325 GBP