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Heart|Natural|GIA

0.51ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 7536277818

Certificate GIA 7536277818

Diamond specifications and retailer prices

From £400 GBP
As of November 6, 2026
Save £138 GBP (26%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £537 GBP at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter 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 7536277818. Listed at 4 retailers as of November 6, 2026, with prices from £400 to £537, a £138 spread on the same certified stone. 77 Diamonds lists it at £537. 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

0.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7536277818
Dimensions4.98 × 5.75 × 3.16 mm
L/W Ratio1.15
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
4.98 mm5.75 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7536277818
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 55.0%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £537 GBP|Low: £345 GBP|High: £545 GBP|Avg: £444 GBP|+5.4%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 5£383 GBP
Retailer 2£400 GBP
Retailer 4£429 GBP
Retailer 3£486 GBP
77 Diamonds£537 GBP

35 data points across 5 retailers

4 retailers£400 GBP to £537 GBP

A
Cheapest Retailer
-
£400 GBP
Final sale: no returns
Retailer 2
-
£429 GBP
View
Price last confirmed 12 days ago
Retailer 3
-
£486 GBP
View
Price last confirmed 13 days ago
Most Expensive
B+
77 Diamonds
HSCPZHY4HKVJ · Nov 6
£537 GBP
View
3 more retailers have this diamond
Prices start from £400 GBPSave up to £138 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
0.51ct Heart
£400 GBP