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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1499381589

Certificate GIA 1499381589

Diamond specifications and retailer prices

From $10,674 CAD
$7,641 USD
As of October 30, 2026
Save $12,125 CAD (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $22,799 CAD 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 $10,674 to $22,799, a $12,125 spread on the same certified stone. NZ Jewellers lists it at $22,799. 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
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: Oct 30
Current: $18,997 CAD|Low: $11,400 CAD|High: $19,226 CAD|Avg: $14,482 CAD|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 7$11,400 CAD
Retailer 4$12,538 CAD
Retailer 8$12,540 CAD
Retailer 6$12,595 CAD
Retailer 3$14,830 CAD
Retailer 2$15,106 CAD
Retailer 5$16,747 CAD
Retailer 1$18,997 CAD

36 data points across 8 retailers

19 retailers$10,674 CAD to $22,799 CAD

Retailer 1
-
$9,766 CAD
$6,991 USD
Price last confirmed 70 days ago
B+
Retailer 2
-
$10,674 CAD
$7,641 USD
View
B+
Retailer 3
-
$11,343 CAD
$8,120 USD
View
B+
Retailer 4
-
$11,400 CAD
$8,161 USD
View
B
Retailer 5
-
$11,400 CAD
$8,161 USD
View
Final sale: no returns
B
Retailer 6
-
$12,350 CAD
$8,841 USD
View
B+
Retailer 7
-
$12,538 CAD
£7,067 GBP
View
B
Retailer 8
-
$12,540 CAD
$8,977 USD
View
Retailer 9
-
$12,595 CAD
A$13,871 AUD
View
Price last confirmed 8 days ago
B
Retailer 10
-
$13,508 CAD
$9,670 USD
View
B
Retailer 11
-
$13,508 CAD
$9,670 USD
View
B
Retailer 12
-
$13,955 CAD
$9,990 USD
View
B
Retailer 13
-
$14,250 CAD
$10,201 USD
View
B
Retailer 14
-
$14,830 CAD
€10,111 EUR
View
Retailer 15
-
$15,008 CAD
$10,744 USD
View
Price last confirmed 9 days ago
B
Retailer 16
-
$15,106 CAD
£8,515 GBP
View
B
Retailer 17
-
$16,747 CAD
ZAR 193,676 ZAR
View
B
Retailer 18
-
$18,997 CAD
£10,708 GBP
View
Most Expensive
B
NZ Jewellers
1689698a-db4d-4d37-997d-21b4358c82c3 · Oct 30
$22,799 CAD
$16,321 USD
View
18 more retailers have this diamond
Prices start from $10,674 CADSave up to $12,125 CAD

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
$10,674 CAD