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Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

GD • H/SI1 • GIA 5436230726

Certificate GIA 5436230726

Diamond specifications and retailer prices

From $8,163 AUD
HK$44,800 HKD
As of November 1, 2026
Save $10,416 AUD (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $18,579 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 SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5436230726. Listed at 19 retailers as of October 30, 2026, with prices from $8,163 to $18,579, a $10,416 spread on the same certified stone. NZ Jewellers lists it at $18,579. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5436230726
Dimensions8.65 × 6.39 × 3.97 mm
L/W Ratio1.35
Top View
8.65 mm6.39 mm1.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5436230726
Side View
Table 58.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 62.1%

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 1
Current: $12,135 AUD|Low: $7,764 AUD|High: $15,668 AUD|Avg: $11,162 AUD|+2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 7$8,163 AUD
Retailer 11$8,677 AUD
Retailer 2$9,290 AUD
Retailer 9$9,296 AUD
Retailer 3$10,219 AUD
Retailer 4$10,473 AUD
Retailer 10$10,710 AUD
Retailer 1$12,135 AUD
Retailer 8$12,240 AUD
Retailer 6$13,649 AUD
Retailer 5$15,482 AUD

42 data points across 11 retailers

19 retailers$8,163 AUD to $18,579 AUD

B+
Cheapest Retailer
-
$8,163 AUD
HK$44,800 HKD
B+
Retailer 2
-
$8,677 AUD
$6,095 USD
View
B
Retailer 3
-
$9,290 AUD
$6,526 USD
View
B
Retailer 4
-
$9,290 AUD
$6,526 USD
View
Final sale: no returns
B+
Retailer 5
-
$9,296 AUD
$6,530 USD
View
B
Retailer 6
-
$9,367 AUD
$6,580 USD
View
B
Retailer 7
-
$10,063 AUD
$7,069 USD
View
B
Retailer 8
-
$10,219 AUD
$7,178 USD
View
B
Retailer 9
-
$10,473 AUD
£5,793 GBP
View
Retailer 10
-
$10,710 AUD
View
Price last confirmed 11 days ago
B
Retailer 11
-
$11,016 AUD
$7,738 USD
View
B
Retailer 12
-
$11,147 AUD
$7,830 USD
View
B
Retailer 13
-
$11,147 AUD
$7,830 USD
View
B
Retailer 14
-
$11,517 AUD
$8,090 USD
View
B
Retailer 15
-
$11,612 AUD
$8,157 USD
View
B
Retailer 16
-
$12,135 AUD
€8,118 EUR
View
B
Retailer 17
-
$13,649 AUD
ZAR 154,887 ZAR
View
B
Retailer 18
-
$15,482 AUD
£8,563 GBP
View
Most Expensive
C
NZ Jewellers
085bec04-f988-43f7-91dc-f6504d0faaee · Oct 30
$18,579 AUD
$13,051 USD
View
18 more retailers have this diamond
Prices start from $8,163 AUDSave up to $10,416 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
$8,163 AUD