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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6545694423

Certificate GIA 6545694423

Diamond specifications and retailer prices

From €5,021 EUR
As of November 6, 2026
Save €6,425 EUR (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €11,447 EUR at NZ Jewellers · As of November 5, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6545694423. Listed at 19 retailers as of November 5, 2026, with prices from €5,021 to €11,447, a €6,425 spread on the same certified stone. NZ Jewellers lists it at €11,447. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6545694423
Dimensions7.33 × 7.35 × 4.52 mm
L/W Ratio1.00
Top View
7.33 mm7.35 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545694423
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.6%

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: €11,447 EUR|Low: €4,975 EUR|High: €11,447 EUR|Avg: €7,032 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 6, 2026
Retailer 16€5,021 EUR
Retailer 7€5,407 EUR
Retailer 5€5,723 EUR
Retailer 9€5,723 EUR
Retailer 18€5,746 EUR
Retailer 4€6,201 EUR
Retailer 8€6,296 EUR
Retailer 12€6,346 EUR
Retailer 17€6,598 EUR
Retailer 15€6,777 EUR
Retailer 6€7,155 EUR
Retailer 10€7,541 EUR
Retailer 11€7,542 EUR
Retailer 3€7,676 EUR
Retailer 2€8,303 EUR
Retailer 13€8,350 EUR
Retailer 14€9,513 EUR
NZ Jewellers€11,447 EUR

33 data points across 18 retailers

19 retailers€5,021 EUR to €11,447 EUR

A
Cheapest Retailer
-
€5,021 EUR
B+
Retailer 2
-
€5,403 EUR
View
B+
Retailer 3
-
€5,407 EUR
View
B+
Retailer 4
-
€5,723 EUR
View
Final sale: no returns
Retailer 5
-
€5,723 EUR
View
Price last confirmed 9 days ago
B+
Retailer 6
-
€5,746 EUR
View
B+
Retailer 7
-
€6,201 EUR
View
B+
Retailer 8
-
€6,296 EUR
View
B+
Retailer 9
-
€6,346 EUR
View
Retailer 10
-
€6,598 EUR
View
Price last confirmed 16 days ago
B+
Retailer 11
-
€6,777 EUR
View
B+
Retailer 12
-
€7,155 EUR
View
Retailer 13
-
€7,541 EUR
View
Price last confirmed 15 days ago
B+
Retailer 14
-
€7,542 EUR
View
B
Retailer 15
-
€7,676 EUR
View
B
Retailer 16
-
€8,303 EUR
View
B
Retailer 17
-
€8,350 EUR
View
B
Retailer 18
-
€9,513 EUR
View
Most Expensive
B
NZ Jewellers
7238d773-89f0-446b-9262-05b231d63538 · Nov 5
€11,447 EUR
$12,780 USD
View
18 more retailers have this diamond
Prices start from €5,021 EURSave up to €6,425 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
€5,021 EUR