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Heart|Natural|GIA

1.51ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 2557604008

Certificate GIA 2557604008

Diamond specifications and retailer prices

From £1,972 GBP
As of November 6, 2026
Save £737 GBP (27%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,709 GBP at GemTrove · As of November 6, 2026
View at GemTrove

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557604008. Listed at 8 retailers as of November 6, 2026, with prices from £1,972 to £2,709, a £737 spread on the same certified stone. GemTrove lists it at £2,709. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557604008
Dimensions7.02 × 8.11 × 4.76 mm
L/W Ratio1.16
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Pinpoint
Top View
7.02 mm8.11 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557604008
Side View
Table 57.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.7%

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: Nov 6
Current: £1,972 GBP|Low: £1,776 GBP|High: £2,724 GBP|Avg: £2,209 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1£1,972 GBP
Retailer 4£1,988 GBP
Retailer 3£2,010 GBP
Retailer 7£2,040 GBP
Retailer 2£2,134 GBP
Retailer 6£2,303 GBP
Retailer 5£2,366 GBP

42 data points across 7 retailers

8 retailers£1,972 GBP to £2,709 GBP

A
Cheapest Retailer
-
£1,972 GBP
A
Retailer 2
-
£1,988 GBP
View
A
Retailer 3
-
£2,010 GBP
View
Final sale: no returns
A
Retailer 4
-
£2,040 GBP
View
A
Retailer 5
-
£2,134 GBP
View
A
Retailer 6
-
£2,303 GBP
View
A
Retailer 7
-
£2,366 GBP
View
Most Expensive
B+
GemTrove
GT-N-01269485-98 · Nov 6
£2,709 GBP
A$5,578 AUD
View
7 more retailers have this diamond
Prices start from £1,972 GBPSave up to £737 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
£1,972 GBP