CaratHunter
Plans
Heart|Natural|GIA

1.51ct L SI1 Heart Natural Diamond

EX • L/SI1 • GIA 6551311460

Certificate GIA 6551311460

Diamond specifications and retailer prices

From €1,651 EUR
As of November 6, 2026
Save €1,033 EUR (38%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €4,597 EUR at NZ Jewellers · As of October 18, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded L 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 6551311460. Listed at 12 retailers as of November 5, 2026, with a 63% 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

1.51
Carat
L
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6551311460
Dimensions7.32 × 8.27 × 4.48 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.32 mm8.27 mm1.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6551311460
Side View
Table 64.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 54.2%

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: €4,597 EUR|Low: €1,639 EUR|High: €4,597 EUR|Avg: €2,336 EUR
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 5€1,651 EUR
Retailer 2€1,766 EUR
Retailer 10€2,060 EUR
Retailer 7€2,185 EUR
Retailer 8€2,199 EUR
Retailer 9€2,199 EUR
Retailer 3€2,326 EUR
Retailer 6€2,537 EUR
Retailer 4€2,683 EUR
NZ Jewellers€4,597 EUR

46 data points across 10 retailers

12 retailers€1,651 EUR to €2,683 EUR

A
Cheapest Retailer
-
€1,651 EUR
A
Retailer 2
-
€1,766 EUR
View
B+
Retailer 3
-
€2,060 EUR
View
B+
Retailer 4
-
€2,185 EUR
View
Retailer 5
-
€2,199 EUR
View
Price last confirmed 21 days ago
Retailer 6
-
€2,199 EUR
View
Price last confirmed 19 days ago
Retailer 7
-
€2,300 EUR
View
Price last confirmed 21 days ago
B+
Retailer 8
-
€2,326 EUR
View
B+
Retailer 9
-
€2,327 EUR
View
Retailer 10
-
€2,537 EUR
View
Price last confirmed 18 days ago
B
Retailer 11
-
€2,683 EUR
View
Most Expensive
NZ Jewellers
f404e1a2-cdbf-4ee4-ba0f-1532e6a78e46 · Oct 18
€4,597 EUR
$5,132 USD
View
Price last confirmed 19 days ago
11 more retailers have this diamond
Prices start from €1,651 EURSave up to €1,033 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
€1,651 EUR