Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 2427623450

Certificate GIA 2427623450

Diamond specifications and retailer prices

From $6,885 USD
As of October 28, 2026
Save $8,028 USD (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $14,913 USD at NZ Jewellers · As of October 27, 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 2427623450. Listed at 19 retailers as of October 27, 2026, with prices from $6,885 to $14,913, a $8,028 spread on the same certified stone. NZ Jewellers lists it at $14,913. 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2427623450
Dimensions9.06 × 6.55 × 4.13 mm
L/W Ratio1.38
Top View
9.06 mm6.55 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2427623450
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 63.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $8,313 USD|Low: $6,885 USD|High: $12,577 USD|Avg: $8,677 USD|-1.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 9$6,885 USD
Retailer 2$6,982 USD
Retailer 11$7,440 USD
Retailer 10$7,519 USD
Retailer 3$8,202 USD
Retailer 1$8,313 USD
Retailer 4$8,451 USD
Retailer 7$8,455 USD
Retailer 6$9,234 USD
Retailer 8$10,761 USD
Retailer 5$12,493 USD

35 data points across 11 retailers

19 retailers$6,885 USD to $14,913 USD

B+
Cheapest Retailer
-
$6,885 USD
B+
Retailer 2
-
$6,982 USD
View
B
Retailer 3
-
$7,440 USD
View
Retailer 4
-
$7,457 USD
View
Price last confirmed 7 days ago
B
Retailer 5
-
$7,519 USD
View
B+
Retailer 6
-
$8,078 USD
View
Retailer 7
-
$8,202 USD
View
Price last confirmed 7 days ago
B+
Retailer 8
-
$8,313 USD
£6,546 GBP
View
B
Retailer 9
-
$8,337 USD
View
B+
Retailer 10
-
$8,451 USD
£6,654 GBP
View
Retailer 11
-
$8,455 USD
A$13,007 AUD
View
Price last confirmed 8 days ago
B
Retailer 12
-
$8,880 USD
View
B
Retailer 13
-
$8,880 USD
View
B
Retailer 14
-
$9,170 USD
View
B
Retailer 15
-
$9,234 USD
€8,794 EUR
View
B
Retailer 16
-
$9,321 USD
View
Retailer 17
-
$10,761 USD
ZAR 173,840 ZAR
View
Price last confirmed 10 days ago
B
Retailer 18
-
$12,493 USD
£9,837 GBP
View
Most Expensive
B
NZ Jewellers
6af18481-3122-4a53-afef-cf2890653e4f · Oct 27
$14,913 USD
View
18 more retailers have this diamond
Prices start from $6,885 USDSave up to $8,028 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.

B+
1.51ct Oval
$6,885 USD