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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

VG • I/SI1 • GIA 1439777400

Certificate GIA 1439777400

Diamond specifications and retailer prices

From £2,008 GBP
As of November 6, 2026
Save £2,566 GBP (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £4,574 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1439777400. Listed at 16 retailers as of November 4, 2026, with prices from £2,008 to £4,574, a £2,566 spread on the same certified stone. MOH London lists it at £4,574. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.26°
Pavilion angle55.01°
OriginNatural
Grading LabGIA
CertificateGIA 1439777400
Dimensions6.39 × 6.34 × 4.43 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
6.39 mm6.34 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1439777400
Side View
Table 62.0%Crown 42.26°Girdle: MED-STKPavilion 55.01°Culet: NoneDepth 69.8%

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: £4,574 GBP|Low: £2,008 GBP|High: £4,642 GBP|Avg: £2,930 GBP|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10£2,008 GBP
Retailer 8£2,299 GBP
Retailer 11£2,531 GBP
Retailer 2£2,575 GBP
Retailer 4£2,588 GBP
Retailer 6£2,798 GBP
Retailer 9£2,840 GBP
Retailer 3£2,938 GBP
Retailer 5£3,192 GBP
Retailer 7£3,348 GBP
MOH London£4,574 GBP

34 data points across 11 retailers

16 retailers£2,008 GBP to £4,574 GBP

A
Cheapest Retailer
-
£2,008 GBP
A
Retailer 2
-
£2,299 GBP
View
A
Retailer 3
-
£2,416 GBP
View
A
Retailer 4
-
£2,435 GBP
View
B+
Retailer 5
-
£2,531 GBP
View
Final sale: no returns
B+
Retailer 6
-
£2,575 GBP
View
A
Retailer 7
-
£2,588 GBP
View
B+
Retailer 8
-
£2,630 GBP
View
B+
Retailer 9
-
£2,798 GBP
View
A
Retailer 10
-
£2,840 GBP
View
B+
Retailer 11
-
£2,851 GBP
View
Retailer 12
-
£2,938 GBP
View
Price last confirmed 30 days ago
B+
Retailer 13
-
£3,192 GBP
View
B+
Retailer 14
-
£3,348 GBP
View
B
Retailer 15
-
£3,891 GBP
View
Most Expensive
B
MOH London
C664DE5D8 · Nov 4
£4,574 GBP
View
15 more retailers have this diamond
Prices start from £2,008 GBPSave up to £2,566 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
£2,008 GBP