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Oval|Natural|GIA

1.51ct G SI1 Oval Natural Diamond

EX • G/SI1 • GIA 6542547818

Certificate GIA 6542547818

Diamond specifications and retailer prices

From $9,464 NZD
HK$41,600 HKD
As of November 1, 2026
Save $8,300 NZD (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $19,266 NZD at Riddles Jewelry · As of October 25, 2026
View at Riddles Jewelry

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded G 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 6542547818. Listed at 22 retailers as of November 1, 2026, with a 88% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle39.6°
OriginNatural
Grading LabGIA
CertificateGIA 6542547818
Dimensions8.67 × 6.32 × 4.15 mm
L/W Ratio1.37
Top View
8.67 mm6.32 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6542547818
Side View
Table 58.0%CrownGirdle: THK-VTKPavilion 39.6°Culet: NoneDepth 65.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $10,228 NZD|Low: $9,464 NZD|High: $24,317 NZD|Avg: $14,833 NZD|-34.1%
Retailer 1
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
Retailer 20
Riddles Jewelry
November 3, 2026
Retailer 2$9,464 NZD
Retailer 18$10,070 NZD
Retailer 1$10,228 NZD
Retailer 9$10,323 NZD
Retailer 6$10,644 NZD
Retailer 5$10,660 NZD
Retailer 7$10,705 NZD
Retailer 20$11,015 NZD
Retailer 19$11,126 NZD
Retailer 10$11,308 NZD
Retailer 12$11,641 NZD
Retailer 16$12,010 NZD
Retailer 15$12,222 NZD
Retailer 14$12,739 NZD
Retailer 8$13,746 NZD
Retailer 17$13,923 NZD
Retailer 11$14,403 NZD
Retailer 4$15,661 NZD
Retailer 13$16,719 NZD
Retailer 3$17,764 NZD
Riddles Jewelry$19,266 NZD

27 data points across 21 retailers

22 retailers$9,464 NZD to $17,764 NZD

A
Cheapest Retailer
-
$9,464 NZD
HK$41,600 HKD
A
Retailer 2
-
$10,070 NZD
$5,666 USD
View
A
Retailer 3
-
$10,228 NZD
$5,755 USD
View
A
Retailer 4
-
$10,323 NZD
$5,808 USD
View
A
Retailer 5
-
$10,522 NZD
$5,920 USD
View
A
Retailer 6
-
$10,644 NZD
$5,989 USD
View
A
Retailer 7
-
$10,660 NZD
$5,998 USD
View
Final sale: no returns
A
Retailer 8
-
$10,705 NZD
$6,023 USD
View
B+
Retailer 9
-
$11,015 NZD
A$9,535 AUD
View
A
Retailer 10
-
$11,126 NZD
$6,260 USD
View
B+
Retailer 11
-
$11,308 NZD
$6,363 USD
View
B+
Retailer 12
-
$11,641 NZD
£5,157 GBP
View
B+
Retailer 13
-
$12,010 NZD
£5,321 GBP
View
B+
Retailer 14
-
$12,222 NZD
$6,877 USD
View
B+
Retailer 15
-
$12,739 NZD
€6,826 EUR
View
Retailer 16
-
$13,746 NZD
$7,734 USD
View
Price last confirmed 7 days ago
B+
Retailer 17
-
$13,923 NZD
€7,461 EUR
View
Retailer 18
-
$14,403 NZD
$8,104 USD
View
Price last confirmed 22 days ago
B+
Retailer 19
-
$15,661 NZD
ZAR 142,356 ZAR
View
Retailer 20
-
$16,719 NZD
A$14,473 AUD
View
Price last confirmed 40 days ago
B
Retailer 21
-
$17,764 NZD
£7,870 GBP
View
Most Expensive
Riddles Jewelry
1985031488 · Oct 25
$19,266 NZD
$10,840 USD
View
Price last confirmed 8 days ago
21 more retailers have this diamond
Prices start from $9,464 NZDSave up to $8,300 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.

A
1.51ct Oval
$9,464 NZD