CaratHunter
Plans
Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1499381589

Certificate GIA 1499381589

Diamond specifications and retailer prices

From $9,768 SGD
$7,641 USD
As of November 1, 2026
Save $11,097 SGD (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $20,865 SGD at NZ Jewellers · As of October 30, 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 1499381589. Listed at 19 retailers as of October 30, 2026, with prices from $9,768 to $20,865, a $11,097 spread on the same certified stone. NZ Jewellers lists it at $20,865. 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 angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1499381589
Dimensions7.30 × 7.28 × 4.57 mm
L/W Ratio1.00
Star length55%
Lower girdle75%
Cert comments
Additional clouds are not shown. Pinpoints are not shown.
Key to symbols
Feather, Cloud
Top View
7.30 mm7.28 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1499381589
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

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: $11,475 SGD|Low: $10,433 SGD|High: $17,595 SGD|Avg: $13,256 SGD|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 7$10,433 SGD
Retailer 1$11,475 SGD
Retailer 8$11,476 SGD
Retailer 6$11,526 SGD
Retailer 4$13,572 SGD
Retailer 3$13,825 SGD
Retailer 5$15,326 SGD
Retailer 2$17,385 SGD

37 data points across 8 retailers

19 retailers$9,768 SGD to $20,865 SGD

Retailer 1
-
$8,937 SGD
$6,991 USD
Price last confirmed 70 days ago
B+
Retailer 2
-
$9,768 SGD
$7,641 USD
View
B+
Retailer 3
-
$10,381 SGD
$8,120 USD
View
B+
Retailer 4
-
$10,433 SGD
$8,161 USD
View
B
Retailer 5
-
$10,433 SGD
$8,161 USD
View
Final sale: no returns
B
Retailer 6
-
$11,302 SGD
$8,841 USD
View
B+
Retailer 7
-
$11,475 SGD
£7,067 GBP
View
B
Retailer 8
-
$11,476 SGD
$8,977 USD
View
Retailer 9
-
$11,526 SGD
A$13,871 AUD
View
Price last confirmed 9 days ago
B
Retailer 10
-
$12,362 SGD
$9,670 USD
View
B
Retailer 11
-
$12,362 SGD
$9,670 USD
View
B
Retailer 12
-
$12,771 SGD
$9,990 USD
View
B
Retailer 13
-
$13,041 SGD
$10,201 USD
View
B
Retailer 14
-
$13,572 SGD
€10,111 EUR
View
Retailer 15
-
$13,735 SGD
$10,744 USD
View
Price last confirmed 10 days ago
B
Retailer 16
-
$13,825 SGD
£8,515 GBP
View
B
Retailer 17
-
$15,326 SGD
ZAR 193,676 ZAR
View
B
Retailer 18
-
$17,385 SGD
£10,708 GBP
View
Most Expensive
B
NZ Jewellers
1689698a-db4d-4d37-997d-21b4358c82c3 · Oct 30
$20,865 SGD
$16,321 USD
View
18 more retailers have this diamond
Prices start from $9,768 SGDSave up to $11,097 SGD

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
$9,768 SGD