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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2566495423

Certificate GIA 2566495423

Diamond specifications and retailer prices

From €4,097 EUR
HK$35,900 HKD
As of November 1, 2026
Save €5,043 EUR (55%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €9,140 EUR at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566495423. Listed at 18 retailers as of October 30, 2026, with prices from €4,097 to €9,140, a €5,043 spread on the same certified stone. NZ Jewellers lists it at €9,140. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2566495423
Dimensions7.33 × 7.37 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Pinpoint, Indented Natural
Top View
7.33 mm7.37 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566495423
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.8%

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 1
Current: €9,140 EUR|Low: €4,063 EUR|High: €9,140 EUR|Avg: €5,723 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
Retailer 17
Retailer 18
November 2, 2026
Retailer 17€4,097 EUR
Retailer 13€4,345 EUR
Retailer 9€4,674 EUR
Retailer 8€4,791 EUR
Retailer 14€4,792 EUR
Retailer 11€5,208 EUR
Retailer 5€5,464 EUR
Retailer 6€5,464 EUR
Retailer 10€5,464 EUR
Retailer 3€5,550 EUR
Retailer 7€5,605 EUR
Retailer 2€5,620 EUR
Retailer 18€5,717 EUR
Retailer 12€5,946 EUR
Retailer 4€6,305 EUR
Retailer 16€6,714 EUR
Retailer 15€8,051 EUR
NZ Jewellers€9,140 EUR

11 data points across 18 retailers

18 retailers€4,097 EUR to €9,140 EUR

A
Cheapest Retailer
-
€4,097 EUR
HK$35,900 HKD
A
Retailer 2
-
€4,345 EUR
₹464,171 INR
View
A
Retailer 3
-
€4,674 EUR
SGD 7,084 SGD
View
A
Retailer 4
-
€4,791 EUR
$5,374 USD
View
A
Retailer 5
-
€4,792 EUR
$5,375 USD
View
B+
Retailer 6
-
€5,208 EUR
£4,599 GBP
View
B+
Retailer 7
-
€5,464 EUR
$6,129 USD
View
B+
Retailer 8
-
€5,464 EUR
$6,129 USD
View
B+
Retailer 9
-
€5,464 EUR
$6,129 USD
View
B+
Retailer 10
-
€5,550 EUR
$6,225 USD
View
B+
Retailer 11
-
€5,605 EUR
$6,286 USD
View
B+
Retailer 12
-
€5,620 EUR
£4,964 GBP
View
B+
Retailer 13
-
€5,717 EUR
$6,412 USD
View
B+
Retailer 14
-
€5,946 EUR
View
B+
Retailer 15
-
€6,305 EUR
$7,072 USD
View
B
Retailer 16
-
€6,714 EUR
ZAR 121,661 ZAR
View
B
Retailer 17
-
€8,051 EUR
£7,110 GBP
View
Most Expensive
B
NZ Jewellers
ff341407-2ec3-4de4-9297-4dde2b7d59ee · Oct 30
€9,140 EUR
$10,252 USD
View
17 more retailers have this diamond
Prices start from €4,097 EURSave up to €5,043 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 Round
€4,097 EUR