Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1533904580

Certificate GIA 1533904580

Diamond specifications and retailer prices

From $4,966 USD
HK$38,800 HKD
As of October 31, 2026
Save $4,946 USD (50%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $11,193 USD at NZ Jewellers · As of September 28, 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 1533904580. Listed at 21 retailers as of October 29, 2026, with a 100% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1533904580
Dimensions7.28 × 7.24 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
Clouds are not shown. Pinpoints are not shown.
Key to symbols
Crystal, Feather, Needle, Indented Natural, Natural
Top View
7.28 mm7.24 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1533904580
Side View
Table 57.0%Crown 36°Girdle: STK-STKPavilion 40.6°Culet: NoneDepth 62.8%

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: Oct 31
Current: $8,226 USD|Low: $4,966 USD|High: $9,978 USD|Avg: $7,294 USD|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 2$4,966 USD
Retailer 9$5,826 USD
Retailer 8$6,176 USD
Retailer 4$6,376 USD
Retailer 7$6,532 USD
Retailer 5$7,332 USD
Retailer 3$7,439 USD
Retailer 1$8,226 USD
Retailer 6$9,912 USD

42 data points across 9 retailers

21 retailers$4,966 USD to $9,912 USD

A
Cheapest Retailer
-
$4,966 USD
HK$38,800 HKD
Retailer 2
-
$5,667 USD
SGD 7,658 SGD
View
Price last confirmed 17 days ago
B+
Retailer 3
-
$5,826 USD
View
B+
Retailer 4
-
$5,836 USD
View
Retailer 5
-
$6,068 USD
View
Price last confirmed 103 days ago
B+
Retailer 6
-
$6,176 USD
View
Final sale: no returns
Retailer 7
-
$6,178 USD
View
Price last confirmed 23 days ago
B+
Retailer 8
-
$6,210 USD
View
B+
Retailer 9
-
$6,376 USD
£5,020 GBP
View
Retailer 10
-
$6,532 USD
A$10,049 AUD
View
Price last confirmed 18 days ago
B+
Retailer 11
-
$6,652 USD
View
Retailer 12
-
$6,692 USD
View
Price last confirmed 23 days ago
Retailer 13
-
$6,795 USD
View
Price last confirmed 32 days ago
B+
Retailer 14
-
$6,852 USD
View
B
Retailer 15
-
$7,332 USD
€6,983 EUR
View
B+
Retailer 16
-
$7,439 USD
£5,857 GBP
View
Retailer 17
-
$7,722 USD
View
Price last confirmed 54 days ago
Retailer 18
-
$7,722 USD
View
Price last confirmed 22 days ago
B+
Retailer 19
-
$8,226 USD
ZAR 132,898 ZAR
View
B
Retailer 20
-
$9,912 USD
£7,805 GBP
View
Most Expensive
NZ Jewellers
2e3019be-6bad-462a-ae34-2634988fc2a2 · Sep 28
$11,193 USD
View
Price last confirmed 33 days ago
20 more retailers have this diamond
Prices start from $4,966 USDSave up to $4,946 USD

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
$4,966 USD