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Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 6521073458

Certificate GIA 6521073458

Diamond specifications and retailer prices

From $6,489 USD
As of October 28, 2026
Save $7,248 USD (53%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $13,737 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 6521073458. Listed at 25 retailers as of October 27, 2026, with prices from $6,489 to $13,737, a $7,248 spread on the same certified stone. NZ Jewellers lists it at $13,737. 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
Crown angle36.88°
Pavilion angle39.48°
OriginNatural
Grading LabGIA
CertificateGIA 6521073458
Dimensions9.06 × 6.44 × 3.96 mm
L/W Ratio1.41
Top View
9.06 mm6.44 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6521073458
Side View
Table 60.0%Crown 36.88°Girdle: MED-THKPavilion 39.48°Culet: NoneDepth 61.5%

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 28
Current: $13,737 USD|Low: $6,295 USD|High: $13,737 USD|Avg: $8,430 USD
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
October 29, 2026
Retailer 7$6,489 USD
Retailer 11$6,534 USD
Retailer 6$6,868 USD
Retailer 19$6,868 USD
Retailer 8$6,875 USD
Retailer 9$6,925 USD
Retailer 10$7,396 USD
Retailer 17$7,441 USD
Retailer 18$7,555 USD
Retailer 2$7,749 USD
Retailer 12$7,784 USD
Retailer 4$7,873 USD
Retailer 5$7,875 USD
Retailer 3$8,585 USD
Retailer 14$8,960 USD
Retailer 16$10,000 USD
Retailer 15$11,462 USD
Retailer 13$11,507 USD
NZ Jewellers$13,737 USD

28 data points across 19 retailers

25 retailers$6,489 USD to $13,737 USD

B+
Cheapest Retailer
-
$6,489 USD
B+
Retailer 2
-
$6,534 USD
View
B+
Retailer 3
-
$6,868 USD
View
B+
Retailer 4
-
$6,868 USD
View
Final sale: no returns
B+
Retailer 5
-
$6,875 USD
View
B+
Retailer 6
-
$6,925 USD
View
Retailer 7
-
$7,314 USD
View
Price last confirmed 7 days ago
B
Retailer 8
-
$7,396 USD
View
B
Retailer 9
-
$7,441 USD
View
B+
Retailer 10
-
$7,555 USD
View
B+
Retailer 11
-
$7,749 USD
£6,102 GBP
View
B+
Retailer 12
-
$7,784 USD
£6,129 GBP
View
Retailer 13
-
$7,873 USD
A$12,112 AUD
View
Price last confirmed 10 days ago
B+
Retailer 14
-
$7,875 USD
View
Retailer 15
-
$7,875 USD
View
Price last confirmed 23 days ago
B+
Retailer 16
-
$7,910 USD
View
B+
Retailer 17
-
$7,910 USD
View
B
Retailer 18
-
$8,180 USD
View
B
Retailer 19
-
$8,292 USD
View
B
Retailer 20
-
$8,585 USD
View
B
Retailer 21
-
$8,960 USD
€8,533 EUR
View
B
Retailer 22
-
$10,000 USD
ZAR 161,553 ZAR
View
B
Retailer 23
-
$11,462 USD
£9,025 GBP
View
B
Retailer 24
-
$11,507 USD
£9,061 GBP
View
Most Expensive
B
NZ Jewellers
98e39236-a9fd-413f-9a9e-022d36809849 · Oct 27
$13,737 USD
View
24 more retailers have this diamond
Prices start from $6,489 USDSave up to $7,248 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
$6,489 USD