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Heart|Natural|GIA

1.31ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 6531769899

Certificate GIA 6531769899

Diamond specifications and retailer prices

From €2,046 EUR
As of November 6, 2026
Save €2,735 EUR (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €5,624 EUR at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.31ct natural heart diamond

This 1.31ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6531769899. Listed at 20 retailers as of November 5, 2026, with a 134% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.07°
Pavilion angle38.95°
OriginNatural
Grading LabGIA
CertificateGIA 6531769899
Dimensions6.66 × 7.59 × 4.49 mm
L/W Ratio1.14
Top View
6.66 mm7.59 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531769899
Side View
Table 60.0%Crown 39.07°Girdle: MED-THKPavilion 38.95°Culet: NoneDepth 59.1%

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: €4,781 EUR|Low: €2,046 EUR|High: €5,624 EUR|Avg: €2,977 EUR
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 7, 2026
Retailer 10€2,046 EUR
Retailer 5€2,343 EUR
Retailer 15€2,458 EUR
Retailer 14€2,532 EUR
Retailer 13€2,669 EUR
Retailer 7€2,690 EUR
Retailer 16€2,744 EUR
Retailer 9€2,837 EUR
Retailer 4€2,850 EUR
Retailer 12€2,871 EUR
Retailer 8€2,873 EUR
Retailer 3€3,088 EUR
Retailer 6€3,166 EUR
Retailer 11€3,350 EUR
Retailer 2€4,564 EUR
NZ Jewellers€4,781 EUR

33 data points across 16 retailers

20 retailers€2,046 EUR to €4,781 EUR

A
Cheapest Retailer
-
€2,046 EUR
A
Retailer 2
-
€2,343 EUR
View
A
Retailer 3
-
€2,458 EUR
View
A
Retailer 4
-
€2,491 EUR
View
A
Retailer 5
-
€2,532 EUR
View
Final sale: no returns
B+
Retailer 6
-
€2,669 EUR
View
Retailer 7
-
€2,690 EUR
View
Price last confirmed 46 days ago
Retailer 8
-
€2,690 EUR
View
Price last confirmed 9 days ago
A
Retailer 9
-
€2,744 EUR
View
B+
Retailer 10
-
€2,837 EUR
View
B+
Retailer 11
-
€2,850 EUR
View
B+
Retailer 12
-
€2,871 EUR
View
Retailer 13
-
€2,873 EUR
View
Price last confirmed 31 days ago
B+
Retailer 14
-
€3,088 EUR
View
Retailer 15
-
€3,103 EUR
View
Price last confirmed 44 days ago
B+
Retailer 16
-
€3,166 EUR
View
B+
Retailer 17
-
€3,350 EUR
View
B
Retailer 18
-
€4,564 EUR
View
B
Retailer 19
-
€4,781 EUR
View
Most Expensive
NZ Jewellers
95c02344-1a40-4209-bdc5-fe4540743353 · Sep 25
€5,624 EUR
$6,279 USD
View
Price last confirmed 42 days ago
19 more retailers have this diamond
Prices start from €2,046 EURSave up to €2,735 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
1.31ct Heart
€2,046 EUR