CaratHunter
Plans
Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 2427009307

Certificate GIA 2427009307

Diamond specifications and retailer prices

From €3,203 EUR
₹342,125 INR
As of October 31, 2026
Save €5,286 EUR (62%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €8,489 EUR at Adiamor · As of November 1, 2026
View at Adiamor

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2427009307. Listed at 15 retailers as of October 31, 2026, with prices from €3,203 to €8,489, a €5,286 spread on the same certified stone. Adiamor lists it at €8,489. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2427009307
Dimensions6.57 × 8.10 × 4.46 mm
L/W Ratio1.23
Top View
6.57 mm8.10 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2427009307
Side View
Table 62.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 55.1%

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: Oct 31
Current: €4,392 EUR|Low: €3,055 EUR|High: €7,615 EUR|Avg: €4,291 EUR|+1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4€3,203 EUR
Retailer 5€3,207 EUR
Retailer 6€3,494 EUR
Retailer 3€3,732 EUR
Retailer 7€4,076 EUR
Retailer 1€4,392 EUR
Retailer 8€4,417 EUR
Retailer 2€7,035 EUR

41 data points across 8 retailers

15 retailers€3,203 EUR to €8,489 EUR

A
Cheapest Retailer
-
€3,203 EUR
₹342,125 INR
A
Retailer 2
-
€3,207 EUR
HK$28,100 HKD
View
A
Retailer 3
-
€3,494 EUR
A$6,029 AUD
View
A
Retailer 4
-
€3,732 EUR
$4,186 USD
View
B+
Retailer 5
-
€3,771 EUR
$4,230 USD
View
B+
Retailer 6
-
€4,076 EUR
$4,572 USD
View
Final sale: no returns
B+
Retailer 7
-
€4,392 EUR
£3,879 GBP
View
B+
Retailer 8
-
€4,417 EUR
$4,954 USD
View
B+
Retailer 9
-
€4,417 EUR
$4,954 USD
View
B+
Retailer 10
-
€4,417 EUR
$4,954 USD
View
B+
Retailer 11
-
€4,552 EUR
$5,105 USD
View
B
Retailer 12
-
€5,096 EUR
$5,716 USD
View
B
Retailer 13
-
€7,035 EUR
£6,213 GBP
View
B
Retailer 14
-
€7,694 EUR
$8,630 USD
View
Most Expensive
B
Adiamor
D-64680553 · Nov 1
€8,489 EUR
$9,521 USD
View
14 more retailers have this diamond
Prices start from €3,203 EURSave up to €5,286 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
€3,203 EUR