Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1555561780

Certificate GIA 1555561780

Diamond specifications and retailer prices

From €5,121 EUR
HK$44,700 HKD
As of October 31, 2026
Save €808 EUR (14%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €7,325 EUR at The Perfect Carat · As of September 29, 2026
View at The Perfect Carat

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 1555561780. Listed at 6 retailers as of October 31, 2026, with a relatively tight 16% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
FluorescenceFaint
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1555561780
Dimensions7.24 × 7.29 × 4.56 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Needle
Top View
7.24 mm7.29 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1555561780
Side View
Table 58.0%CrownGirdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.8%

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: Oct 31
Current: €5,788 EUR|Low: €5,121 EUR|High: €12,203 EUR|Avg: €7,563 EUR|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 3€5,121 EUR
Retailer 1€5,788 EUR
Retailer 2€5,929 EUR
Retailer 7€5,983 EUR
Retailer 4€7,677 EUR
Retailer 5€9,876 EUR
Retailer 6€11,927 EUR

25 data points across 7 retailers

6 retailers€5,121 EUR to €5,929 EUR

A
Cheapest Retailer
-
€5,121 EUR
HK$44,700 HKD
A
Retailer 2
-
€5,788 EUR
View
A
Retailer 3
-
€5,929 EUR
$6,624 USD
View
Retailer 4
-
€5,983 EUR
SGD 9,033 SGD
View
Price last confirmed 23 days ago
Retailer 5
-
€7,131 EUR
$7,967 USD
View
Price last confirmed 24 days ago
Most Expensive
The Perfect Carat
tpc_f6a4e049-9738-4e80-b743-4f6da669d118 · Sep 29
€7,325 EUR
$8,183 USD
View
Price last confirmed 32 days ago
5 more retailers have this diamond
Prices start from €5,121 EURSave up to €808 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
€5,121 EUR