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Heart|Natural|GIA

1.51ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 6431871498

Certificate GIA 6431871498

Diamond specifications and retailer prices

From €1,937 EUR
As of November 6, 2026
Save €956 EUR (33%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: €2,893 EUR at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

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 6431871498. Listed at 8 retailers as of November 6, 2026, with prices from €1,937 to €2,893, a €956 spread on the same certified stone. 77 Diamonds lists it at €2,893. 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
SymmetryExcellent
FluorescenceNone
Crown angle39.09°
Pavilion angle39.18°
OriginNatural
Grading LabGIA
CertificateGIA 6431871498
Dimensions6.82 × 8.06 × 4.63 mm
L/W Ratio1.18
Top View
6.82 mm8.06 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6431871498
Side View
Table 61.0%Crown 39.09°Girdle: MED-VTKPavilion 39.18°Culet: NoneDepth 57.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: €2,893 EUR|Low: €1,937 EUR|High: €2,925 EUR|Avg: €2,307 EUR|+1.4%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5€1,937 EUR
Retailer 7€1,969 EUR
Retailer 8€1,979 EUR
Retailer 6€2,064 EUR
Retailer 9€2,356 EUR
Retailer 3€2,374 EUR
Retailer 4€2,385 EUR
Retailer 2€2,825 EUR
77 Diamonds€2,893 EUR

41 data points across 9 retailers

8 retailers€1,937 EUR to €2,893 EUR

A
Cheapest Retailer
-
€1,937 EUR
A
Retailer 2
-
€1,969 EUR
View
A
Retailer 3
-
€1,979 EUR
View
A
Retailer 4
-
€2,064 EUR
View
A
Retailer 5
-
€2,374 EUR
View
A
Retailer 6
-
€2,385 EUR
View
A
Retailer 7
-
€2,825 EUR
View
Most Expensive
A
77 Diamonds
HSMBVVDQGGSS · Nov 6
€2,893 EUR
£2,543 GBP
View
7 more retailers have this diamond
Prices start from €1,937 EURSave up to €956 EUR

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
€1,937 EUR