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Heart|Natural|GIA

1.51ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 11955784

Certificate GIA 11955784

Diamond specifications and retailer prices

From £5,537 GBP
$7,430 USD
As of October 31, 2026
Save £4,057 GBP (42%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £9,594 GBP at MOH London · As of November 2, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 11955784. Listed at 12 retailers as of October 31, 2026, with prices from £5,537 to £9,594, a £4,057 spread on the same certified stone. MOH London lists it at £9,594. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishGood
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 11955784
Dimensions7.19 × 7.82 × 4.42 mm
L/W Ratio1.09
Culet sizeNone
Top View
7.19 mm7.82 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishGood
SymmetryGood
FluorescenceNone
CertificateGIA 11955784
Side View
Table 60.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 56.6%

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 31
Current: £9,594 GBP|Low: £5,537 GBP|High: £9,709 GBP|Avg: £7,108 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 6£5,537 GBP
Retailer 3£6,422 GBP
Retailer 5£6,431 GBP
Retailer 4£6,487 GBP
Retailer 2£7,519 GBP
Retailer 7£7,580 GBP
MOH London£9,594 GBP

43 data points across 7 retailers

12 retailers£5,537 GBP to £9,594 GBP

B+
Cheapest Retailer
-
£5,537 GBP
$7,430 USD
B+
Retailer 2
-
£5,650 GBP
CA$10,531 CAD
View
B+
Retailer 3
-
£6,422 GBP
View
B
Retailer 4
-
£6,431 GBP
$8,630 USD
View
Retailer 5
-
£6,487 GBP
A$13,393 AUD
View
Price last confirmed 10 days ago
B
Retailer 6
-
£6,608 GBP
$8,867 USD
View
B
Retailer 7
-
£6,841 GBP
$9,180 USD
View
B
Retailer 8
-
£6,841 GBP
$9,180 USD
View
B
Retailer 9
-
£7,072 GBP
$9,490 USD
View
B
Retailer 10
-
£7,519 GBP
€9,610 EUR
View
Retailer 11
-
£7,580 GBP
$10,172 USD
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
071D4CC6A · Nov 2
£9,594 GBP
View
11 more retailers have this diamond
Prices start from £5,537 GBPSave up to £4,057 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+
1.51ct Heart
£5,537 GBP