Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 3555666374

Certificate GIA 3555666374

Diamond specifications and retailer prices

From $4,788 USD
As of October 19, 2026
13 retailers carry this diamond
Most expensive: $11,381 USD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval 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 stated by the retailer rather than the lab and certified by GIA 3555666374. Listed at 13 retailers as of October 17, 2026. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle37.6°
OriginNatural
Grading LabGIA
CertificateGIA 3555666374
Dimensions9.04 × 6.54 × 4.11 mm
L/W Ratio1.38
Girdle conditionFaceted
Top View
9.04 mm6.54 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555666374
Side View
Table 59.0%Crown 37.2°Girdle: MED-THKPavilion 37.6°Culet: NoneDepth 62.7%

Caratlytics Score

No score right now
No retailer has confirmed this stone recently, so we are not scoring it. Prices below are as of the date shown.

Price History

Last verified: Oct 19
Current: $11,381 USD|Low: $4,788 USD|High: $11,624 USD|Avg: $6,874 USD|-2.1%
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
Retailer 20
October 21, 2026
Retailer 20$4,788 USD
Retailer 13$4,902 USD
Retailer 18$5,220 USD
Retailer 9$5,480 USD
Retailer 19$5,526 USD
Retailer 17$5,580 USD
Retailer 15$5,986 USD
Retailer 7$6,165 USD
Retailer 10$6,165 USD
Retailer 2$6,369 USD
Retailer 16$6,670 USD
Retailer 12$6,816 USD
Retailer 8$6,860 USD
Retailer 4$6,907 USD
Retailer 11$7,090 USD
Retailer 5$7,380 USD
Retailer 14$7,565 USD
Retailer 6$8,260 USD
Retailer 3$9,788 USD
NZ Jewellers$11,381 USD

30 data points across 20 retailers

13 retailers$4,788 USD to $11,381 USD

Retailer 1
-
$4,788 USD
Price last confirmed 13 days ago
Retailer 2
-
$4,902 USD
HK$38,300 HKD
View
Price last confirmed 12 days ago
Retailer 3
-
$5,220 USD
View
Price last confirmed 12 days ago
Retailer 4
-
$5,986 USD
View
Price last confirmed 12 days ago
Retailer 5
-
$6,165 USD
View
Price last confirmed 15 days ago
Retailer 6
-
$6,165 USD
View
Price last confirmed 16 days ago
Retailer 7
-
$6,369 USD
£5,015 GBP
View
Price last confirmed 11 days ago
Retailer 8
-
$6,816 USD
A$10,486 AUD
View
Price last confirmed 28 days ago
Retailer 9
-
$6,907 USD
View
Price last confirmed 13 days ago
Retailer 10
-
$7,090 USD
View
Price last confirmed 13 days ago
Retailer 11
-
$8,260 USD
ZAR 133,442 ZAR
View
Price last confirmed 15 days ago
Retailer 12
-
$9,788 USD
£7,707 GBP
View
Price last confirmed 13 days ago
Most Expensive
NZ Jewellers
1733883e-14a1-40c5-b683-c2c469e4271f · Oct 17
$11,381 USD
View
Price last confirmed 14 days ago
12 more retailers have this diamond

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.

1.51ct Oval
$4,788 USD