Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 6521073458

Certificate GIA 6521073458

Diamond specifications and retailer prices

From $11,513 NZD
$6,489 USD
As of October 28, 2026
Save $12,860 NZD (53%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $24,374 NZD 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 24 retailers as of October 27, 2026, with prices from $11,513 to $24,374, a $12,860 spread on the same certified stone. NZ Jewellers lists it at $24,374. 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 (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: $24,374 NZD|Low: $11,169 NZD|High: $24,374 NZD|Avg: $14,958 NZD
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$11,513 NZD
Retailer 11$11,593 NZD
Retailer 6$12,186 NZD
Retailer 19$12,186 NZD
Retailer 8$12,198 NZD
Retailer 9$12,287 NZD
Retailer 10$13,123 NZD
Retailer 17$13,203 NZD
Retailer 18$13,405 NZD
Retailer 2$13,750 NZD
Retailer 12$13,811 NZD
Retailer 4$13,969 NZD
Retailer 5$13,973 NZD
Retailer 3$15,232 NZD
Retailer 14$15,897 NZD
Retailer 16$17,743 NZD
Retailer 15$20,337 NZD
Retailer 13$20,418 NZD
NZ Jewellers$24,374 NZD

28 data points across 19 retailers

24 retailers$11,513 NZD to $24,374 NZD

B+
Cheapest Retailer
-
$11,513 NZD
$6,489 USD
B+
Retailer 2
-
$11,593 NZD
$6,534 USD
View
B+
Retailer 3
-
$12,186 NZD
$6,868 USD
View
B+
Retailer 4
-
$12,198 NZD
$6,875 USD
View
B+
Retailer 5
-
$12,287 NZD
$6,925 USD
View
Retailer 6
-
$12,977 NZD
$7,314 USD
View
Price last confirmed 8 days ago
B
Retailer 7
-
$13,123 NZD
$7,396 USD
View
B
Retailer 8
-
$13,203 NZD
$7,441 USD
View
B+
Retailer 9
-
$13,405 NZD
$7,555 USD
View
B+
Retailer 10
-
$13,750 NZD
£6,102 GBP
View
B+
Retailer 11
-
$13,811 NZD
£6,129 GBP
View
Retailer 12
-
$13,969 NZD
A$12,112 AUD
View
Price last confirmed 11 days ago
B+
Retailer 13
-
$13,973 NZD
$7,875 USD
View
Retailer 14
-
$13,973 NZD
$7,875 USD
View
Price last confirmed 24 days ago
B+
Retailer 15
-
$14,035 NZD
$7,910 USD
View
B+
Retailer 16
-
$14,035 NZD
$7,910 USD
View
B
Retailer 17
-
$14,514 NZD
$8,180 USD
View
B
Retailer 18
-
$14,712 NZD
$8,292 USD
View
B
Retailer 19
-
$15,232 NZD
$8,585 USD
View
B
Retailer 20
-
$15,897 NZD
€8,533 EUR
View
B
Retailer 21
-
$17,743 NZD
ZAR 161,553 ZAR
View
B
Retailer 22
-
$20,337 NZD
£9,025 GBP
View
B
Retailer 23
-
$20,418 NZD
£9,061 GBP
View
Most Expensive
B
NZ Jewellers
98e39236-a9fd-413f-9a9e-022d36809849 · Oct 27
$24,374 NZD
$13,737 USD
View
23 more retailers have this diamond
Prices start from $11,513 NZDSave up to $12,860 NZD

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
$11,513 NZD