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Heart|Lab Grown|IGI

1.51ct D IF Heart Lab Grown Diamond

ID • D/IF • IGI LG623495261

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG623495261

Diamond specifications and retailer prices

From £282 GBP
$378 USD
As of October 30, 2026
Save £2,247 GBP (89%) vs most expensive(unlock to see where)
31 retailers carry this diamond
Most expensive: £2,529 GBP at Novita Diamonds · As of October 31, 2026
View at Novita Diamonds

About this 1.51ct lab-grown heart diamond

This 1.51ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG623495261 or 623495261. Listed at 31 retailers as of October 30, 2026, with prices from £282 to £2,529, a £2,247 spread on the same certified stone. Novita Diamonds lists it at £2,529. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623495261
Dimensions7.08 × 7.89 × 4.71 mm
L/W Ratio1.11
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
7.08 mm7.89 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623495261
Side View
Table 58.0%Crown 36°Girdle: MED-THKPavilion 39.4°Culet: NoneDepth 59.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,529 GBP|Low: £282 GBP|High: £2,924 GBP|Avg: £1,176 GBP|-5.0%
Novita Diamonds
Retailer 2
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Retailer 21
November 1, 2026
Retailer 4£282 GBP
Retailer 19£345 GBP
Retailer 11£497 GBP
Retailer 18£504 GBP
Retailer 9£532 GBP
Retailer 3£545 GBP
Retailer 5£602 GBP
Retailer 2£635 GBP
Retailer 17£663 GBP
Retailer 10£893 GBP
Retailer 15£898 GBP
Retailer 21£981 GBP
Retailer 16£1,192 GBP
Retailer 6£1,308 GBP
Retailer 7£1,308 GBP
Retailer 12£1,354 GBP
Retailer 20£1,425 GBP
Retailer 14£1,441 GBP
Retailer 13£2,045 GBP
Retailer 8£2,500 GBP
Novita Diamonds£2,529 GBP

40 data points across 21 retailers

31 retailers£282 GBP to £2,529 GBP

A
Cheapest Retailer
-
£282 GBP
$378 USD
Retailer 2
-
£282 GBP
$378 USD
View
Price last confirmed 24 days ago
Retailer 3
-
£282 GBP
$378 USD
View
Price last confirmed 21 days ago
A
Retailer 4
-
£345 GBP
$462 USD
View
Final sale: no returns
Retailer 5
-
£349 GBP
$468 USD
View
Price last confirmed 29 days ago
Retailer 6
-
£349 GBP
$468 USD
View
Price last confirmed 22 days ago
A
Retailer 7
-
£497 GBP
HK$5,200 HKD
View
A
Retailer 8
-
£504 GBP
$675 USD
View
A
Retailer 9
-
£532 GBP
$713 USD
View
A
Retailer 10
-
£545 GBP
$730 USD
View
A
Retailer 11
-
£602 GBP
$806 USD
View
Retailer 12
-
£602 GBP
$807 USD
View
Price last confirmed 32 days ago
A
Retailer 13
-
£635 GBP
View
Retailer 14
-
£655 GBP
$878 USD
View
Price last confirmed 34 days ago
A
Retailer 15
-
£663 GBP
ZAR 14,351 ZAR
View
Retailer 16
-
£689 GBP
$923 USD
View
Price last confirmed 35 days ago
B+
Retailer 17
-
£893 GBP
$1,196 USD
View
B+
Retailer 18
-
£898 GBP
A$1,852 AUD
View
B+
Retailer 19
-
£981 GBP
$1,314 USD
View
B+
Retailer 20
-
£1,192 GBP
A$2,458 AUD
View
Retailer 21
-
£1,240 GBP
$1,662 USD
View
Price last confirmed 22 days ago
B+
Retailer 22
-
£1,240 GBP
$1,662 USD
View
B+
Retailer 23
-
£1,308 GBP
$1,753 USD
View
B+
Retailer 24
-
£1,308 GBP
$1,753 USD
View
B+
Retailer 25
-
£1,354 GBP
$1,815 USD
View
Retailer 26
-
£1,425 GBP
View
Price last confirmed 11 days ago
B
Retailer 27
-
£1,441 GBP
SGD 2,609 SGD
View
B
Retailer 28
-
£2,045 GBP
$2,740 USD
View
Retailer 29
-
£2,167 GBP
$2,904 USD
View
Price last confirmed 32 days ago
B
Retailer 30
-
£2,500 GBP
$3,350 USD
View
Most Expensive
B
Novita Diamonds
cert_623495261 · Oct 31
£2,529 GBP
A$5,214 AUD
View
30 more retailers have this diamond
Prices start from £282 GBPSave up to £2,247 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
1.51ct Heart
£282 GBP