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Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

VG • I/SI1 • GIA 2427873957

Certificate GIA 2427873957

Diamond specifications and retailer prices

From $8,054 AUD
HK$44,200 HKD
As of November 1, 2026
Save $10,256 AUD (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $18,310 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2427873957. Listed at 19 retailers as of October 30, 2026, with prices from $8,054 to $18,310, a $10,256 spread on the same certified stone. NZ Jewellers lists it at $18,310. 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
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2427873957
Dimensions8.59 × 6.30 × 4.02 mm
L/W Ratio1.36
Top View
8.59 mm6.30 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2427873957
Side View
Table 56.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.7%

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 1
Current: $11,958 AUD|Low: $7,673 AUD|High: $15,440 AUD|Avg: $10,898 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
Retailer 12
November 2, 2026
Retailer 8$8,054 AUD
Retailer 11$8,563 AUD
Retailer 2$9,154 AUD
Retailer 12$9,232 AUD
Retailer 4$9,918 AUD
Retailer 3$10,071 AUD
Retailer 5$10,321 AUD
Retailer 10$10,555 AUD
Retailer 1$11,958 AUD
Retailer 9$12,062 AUD
Retailer 7$13,450 AUD
Retailer 6$15,257 AUD

43 data points across 12 retailers

19 retailers$8,054 AUD to $18,310 AUD

B+
Cheapest Retailer
-
$8,054 AUD
HK$44,200 HKD
B+
Retailer 2
-
$8,563 AUD
$6,015 USD
View
B+
Retailer 3
-
$9,154 AUD
$6,430 USD
View
Final sale: no returns
B+
Retailer 4
-
$9,155 AUD
$6,431 USD
View
B+
Retailer 5
-
$9,231 AUD
$6,484 USD
View
B+
Retailer 6
-
$9,232 AUD
$6,485 USD
View
B
Retailer 7
-
$9,918 AUD
$6,967 USD
View
B
Retailer 8
-
$10,071 AUD
$7,074 USD
View
B
Retailer 9
-
$10,321 AUD
£5,709 GBP
View
Retailer 10
-
$10,555 AUD
View
Price last confirmed 11 days ago
B
Retailer 11
-
$10,856 AUD
$7,626 USD
View
B
Retailer 12
-
$10,990 AUD
$7,720 USD
View
B
Retailer 13
-
$10,990 AUD
$7,720 USD
View
B
Retailer 14
-
$11,360 AUD
$7,980 USD
View
B
Retailer 15
-
$11,443 AUD
$8,038 USD
View
B
Retailer 16
-
$11,958 AUD
€8,000 EUR
View
B
Retailer 17
-
$13,450 AUD
ZAR 152,636 ZAR
View
B
Retailer 18
-
$15,257 AUD
£8,439 GBP
View
Most Expensive
C
NZ Jewellers
291f68da-725f-4ac0-8c62-3671c641db6a · Oct 30
$18,310 AUD
$12,862 USD
View
18 more retailers have this diamond
Prices start from $8,054 AUDSave up to $10,256 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
$8,054 AUD