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Oval|Natural|GIA

1.51ct H SI2 Oval Natural Diamond

ID • H/SI2 • GIA 1548148688

Certificate GIA 1548148688

Diamond specifications and retailer prices

From $8,069 AUD
$5,668 USD
As of November 2, 2026
Save $10,360 AUD (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $18,429 AUD at NZ Jewellers · As of October 30, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1548148688. Listed at 18 retailers as of October 30, 2026, with prices from $8,069 to $18,429, a $10,360 spread on the same certified stone. NZ Jewellers lists it at $18,429. 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.14°
Pavilion angle36.64°
OriginNatural
Grading LabGIA
CertificateGIA 1548148688
Dimensions9.13 × 6.40 × 3.82 mm
L/W Ratio1.43
Girdle conditionVery Thick
Key to symbols
Twinning Wisp, Feather, Cavity, Indented Natural
Top View
9.13 mm6.40 mm1.51 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1548148688
Side View
Table 59.0%Crown 39.14°Girdle: STK-VTKPavilion 36.64°Culet: NoneDepth 59.7%

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: Nov 2
Current: $18,429 AUD|Low: $7,988 AUD|High: $18,429 AUD|Avg: $11,185 AUD
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
November 2, 2026
Retailer 4$8,069 AUD
Retailer 13$8,705 AUD
Retailer 7$9,214 AUD
Retailer 12$9,214 AUD
Retailer 14$9,290 AUD
Retailer 5$9,982 AUD
Retailer 15$10,136 AUD
Retailer 3$10,169 AUD
Retailer 8$10,388 AUD
Retailer 11$11,106 AUD
Retailer 6$11,517 AUD
Retailer 2$12,036 AUD
Retailer 10$12,140 AUD
Retailer 9$15,355 AUD
NZ Jewellers$18,429 AUD

42 data points across 15 retailers

18 retailers$8,069 AUD to $18,429 AUD

B+
Cheapest Retailer
-
$8,069 AUD
$5,668 USD
B+
Retailer 2
-
$8,705 AUD
$6,115 USD
View
B+
Retailer 3
-
$9,214 AUD
$6,472 USD
View
B+
Retailer 4
-
$9,214 AUD
$6,472 USD
View
Final sale: no returns
B+
Retailer 5
-
$9,290 AUD
$6,526 USD
View
B+
Retailer 6
-
$9,982 AUD
$7,012 USD
View
B
Retailer 7
-
$10,136 AUD
$7,120 USD
View
B
Retailer 8
-
$10,169 AUD
$7,143 USD
View
B+
Retailer 9
-
$10,388 AUD
£5,746 GBP
View
B+
Retailer 10
-
$10,926 AUD
$7,675 USD
View
B+
Retailer 11
-
$11,061 AUD
$7,770 USD
View
B+
Retailer 12
-
$11,061 AUD
$7,770 USD
View
B+
Retailer 13
-
$11,106 AUD
$7,801 USD
View
B
Retailer 14
-
$11,432 AUD
$8,030 USD
View
B
Retailer 15
-
$11,517 AUD
$8,090 USD
View
B
Retailer 16
-
$12,036 AUD
€8,052 EUR
View
B
Retailer 17
-
$15,355 AUD
£8,493 GBP
View
Most Expensive
B
NZ Jewellers
4d673faf-1ed0-41f7-8537-26c63027609b · Oct 30
$18,429 AUD
$12,945 USD
View
17 more retailers have this diamond
Prices start from $8,069 AUDSave up to $10,360 AUD

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
$8,069 AUD