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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6555735876

Certificate GIA 6555735876

Diamond specifications and retailer prices

From €5,478 EUR
HK$48,000 HKD
As of November 1, 2026
Save €6,971 EUR (56%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €12,449 EUR at NZ Jewellers · As of November 2, 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 6555735876. Listed at 20 retailers as of November 1, 2026, with prices from €5,478 to €12,449, a €6,971 spread on the same certified stone. NZ Jewellers lists it at €12,449. 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 angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6555735876
Dimensions7.25 × 7.29 × 4.55 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.25 mm7.29 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555735876
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

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: Nov 1
Current: €12,449 EUR|Low: €5,432 EUR|High: €12,449 EUR|Avg: €7,634 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
Retailer 19
November 3, 2026
Retailer 16€5,478 EUR
Retailer 7€5,881 EUR
Retailer 9€6,223 EUR
Retailer 5€6,225 EUR
Retailer 18€6,228 EUR
Retailer 3€6,743 EUR
Retailer 8€6,847 EUR
Retailer 2€6,978 EUR
Retailer 17€7,138 EUR
Retailer 13€7,409 EUR
Retailer 4€7,436 EUR
Retailer 10€7,436 EUR
Retailer 19€7,685 EUR
Retailer 6€7,781 EUR
Retailer 11€8,199 EUR
Retailer 12€8,248 EUR
Retailer 15€9,144 EUR
Retailer 14€10,373 EUR
NZ Jewellers€12,449 EUR

36 data points across 19 retailers

20 retailers€5,478 EUR to €12,449 EUR

B+
Cheapest Retailer
-
€5,478 EUR
HK$48,000 HKD
B+
Retailer 2
-
€5,592 EUR
A$9,650 AUD
View
B+
Retailer 3
-
€5,881 EUR
$6,596 USD
View
B+
Retailer 4
-
€6,223 EUR
$6,980 USD
View
Final sale: no returns
B+
Retailer 5
-
€6,225 EUR
$6,982 USD
View
B+
Retailer 6
-
€6,228 EUR
$6,985 USD
View
B
Retailer 7
-
€6,743 EUR
$7,563 USD
View
B+
Retailer 8
-
€6,847 EUR
$7,680 USD
View
B+
Retailer 9
-
€6,978 EUR
£6,163 GBP
View
Retailer 10
-
€7,138 EUR
A$12,317 AUD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
€7,409 EUR
View
B
Retailer 12
-
€7,436 EUR
$8,340 USD
View
B
Retailer 13
-
€7,436 EUR
$8,340 USD
View
B
Retailer 14
-
€7,685 EUR
$8,620 USD
View
B
Retailer 15
-
€7,781 EUR
$8,727 USD
View
Retailer 16
-
€8,199 EUR
$9,196 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
€8,248 EUR
£7,284 GBP
View
B
Retailer 18
-
€9,144 EUR
ZAR 165,691 ZAR
View
B
Retailer 19
-
€10,373 EUR
£9,161 GBP
View
Most Expensive
B
NZ Jewellers
709b4404-daec-4c0b-b654-fb474c7a1d60 · Nov 2
€12,449 EUR
$13,963 USD
View
19 more retailers have this diamond
Prices start from €5,478 EURSave up to €6,971 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
€5,478 EUR