CaratHunter
Plans
Heart|Natural|GIA

1.51ct K SI2 Heart Natural Diamond

EX • K/SI2 • GIA 6565678111

Certificate GIA 6565678111

Diamond specifications and retailer prices

From £1,627 GBP
As of November 5, 2026
Save £1,311 GBP (45%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,939 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565678111. Listed at 8 retailers as of November 5, 2026, with prices from £1,627 to £2,939, a £1,311 spread on the same certified stone. Wholesale Diamonds Direct lists it at £2,939. 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

1.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.47°
Pavilion angle38.33°
OriginNatural
Grading LabGIA
CertificateGIA 6565678111
Dimensions7.81 × 6.95 × 4.66 mm
L/W Ratio1.12
Culet sizeNone
Top View
7.81 mm6.95 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6565678111
Side View
Table 57.0%Crown 35.47°Girdle: STK-VTKPavilion 38.33°Culet: NDepth 59.6%

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: Nov 5
Current: £1,875 GBP|Low: £1,625 GBP|High: £2,939 GBP|Avg: £1,999 GBP|+1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Wholesale Diamonds Direct
November 7, 2026
Retailer 2£1,627 GBP
Retailer 7£1,674 GBP
Retailer 3£1,728 GBP
Retailer 4£1,758 GBP
Retailer 1£1,875 GBP
Retailer 6£1,914 GBP
Retailer 5£2,072 GBP
Wholesale Diamonds Direct£2,939 GBP

17 data points across 8 retailers

8 retailers£1,627 GBP to £2,939 GBP

A
Cheapest Retailer
-
£1,627 GBP
A
Retailer 2
-
£1,674 GBP
View
A
Retailer 3
-
£1,728 GBP
View
A
Retailer 4
-
£1,758 GBP
View
A
Retailer 5
-
£1,875 GBP
View
A
Retailer 6
-
£1,914 GBP
View
B+
Retailer 7
-
£2,072 GBP
View
Most Expensive
B+
Wholesale Diamonds Direct
585254021 · Nov 6
£2,939 GBP
$3,933 USD
View
7 more retailers have this diamond
Prices start from £1,627 GBPSave up to £1,311 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
£1,627 GBP