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1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2427279307

Certificate GIA 2427279307

Diamond specifications and retailer prices

From €8,145 EUR
$9,100 USD
As of October 25, 2026
Save €8,826 EUR (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €16,971 EUR at Diamond Quarter · As of October 31, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2427279307. Listed at 19 retailers as of October 25, 2026, with prices from €8,145 to €16,971, a €8,826 spread on the same certified stone. Diamond Quarter lists it at €16,971. 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
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2427279307
Dimensions7.41 × 7.37 × 4.53 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.41 mm7.37 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2427279307
Side View
Table 58.0%Crown 32°Girdle: Slightly ThickPavilion 41.4°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 25
Current: €9,692 EUR|Low: €8,145 EUR|High: €14,085 EUR|Avg: €10,574 EUR|+0.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 8€8,145 EUR
Retailer 9€8,268 EUR
Retailer 10€8,817 EUR
Retailer 1€9,692 EUR
Retailer 2€9,802 EUR
Retailer 7€9,811 EUR
Retailer 5€10,753 EUR
Retailer 4€10,993 EUR
Retailer 3€13,092 EUR
Retailer 6€13,991 EUR

42 data points across 10 retailers

19 retailers€8,145 EUR to €16,971 EUR

B+
Cheapest Retailer
-
€8,145 EUR
$9,100 USD
B+
Retailer 2
-
€8,268 EUR
$9,237 USD
View
B+
Retailer 3
-
€8,817 EUR
$9,850 USD
View
B+
Retailer 4
-
€8,912 EUR
$9,956 USD
View
B+
Retailer 5
-
€9,654 EUR
$10,785 USD
View
B+
Retailer 6
-
€9,692 EUR
£8,526 GBP
View
B+
Retailer 7
-
€9,802 EUR
$10,951 USD
View
Retailer 8
-
€9,811 EUR
A$16,864 AUD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
€10,446 EUR
$11,670 USD
View
B+
Retailer 10
-
€10,446 EUR
$11,670 USD
View
B+
Retailer 11
-
€10,753 EUR
View
B+
Retailer 12
-
€10,993 EUR
£9,671 GBP
View
B
Retailer 13
-
€11,139 EUR
$12,445 USD
View
B
Retailer 14
-
€11,663 EUR
$13,030 USD
View
Retailer 15
-
€11,725 EUR
$13,099 USD
View
Price last confirmed 9 days ago
B
Retailer 16
-
€13,092 EUR
ZAR 236,284 ZAR
View
B
Retailer 17
-
€13,991 EUR
£12,308 GBP
View
B
Retailer 18
-
€14,852 EUR
$16,593 USD
View
Most Expensive
B
Diamond Quarter
1.51SI1E2407034AN · Oct 31
€16,971 EUR
£14,929 GBP
View
18 more retailers have this diamond
Prices start from €8,145 EURSave up to €8,826 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.

B+
1.51ct Round
€8,145 EUR