Oval|Natural|GIA

1.51ct G SI1 Oval Natural Diamond

EX • G/SI1 • GIA 6542547818

Certificate GIA 6542547818

Diamond specifications and retailer prices

From $5,325 USD
HK$41,600 HKD
As of November 1, 2026
Save $4,670 USD (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $10,840 USD 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
Color
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: $6,615 USD|Low: $5,325 USD|High: $13,682 USD|Avg: $8,179 USD|-30.1%
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
Retailer 21
Riddles Jewelry
November 2, 2026
Retailer 18$5,325 USD
Retailer 12$5,666 USD
Retailer 9$5,808 USD
Retailer 6$5,989 USD
Retailer 2$5,998 USD
Retailer 7$6,023 USD
Retailer 3$6,130 USD
Retailer 16$6,198 USD
Retailer 15$6,260 USD
Retailer 10$6,363 USD
Retailer 1$6,615 USD
Retailer 19$6,758 USD
Retailer 5$6,987 USD
Retailer 14$7,110 USD
Retailer 17$7,289 USD
Retailer 8$7,734 USD
Retailer 4$7,962 USD
Retailer 11$8,104 USD
Retailer 21$8,812 USD
Retailer 13$9,407 USD
Retailer 20$9,995 USD
Riddles Jewelry$10,840 USD

26 data points across 22 retailers

22 retailers$5,325 USD to $9,995 USD

A
Cheapest Retailer
-
$5,325 USD
HK$41,600 HKD
A
Retailer 2
-
$5,666 USD
View
A
Retailer 3
-
$5,808 USD
View
A
Retailer 4
-
$5,920 USD
View
A
Retailer 5
-
$5,989 USD
View
A
Retailer 6
-
$5,998 USD
View
Final sale: no returns
A
Retailer 7
-
$6,023 USD
View
A
Retailer 8
-
$6,130 USD
View
B+
Retailer 9
-
$6,198 USD
A$9,535 AUD
View
A
Retailer 10
-
$6,260 USD
View
B+
Retailer 11
-
$6,363 USD
View
B+
Retailer 12
-
$6,615 USD
£5,208 GBP
View
B+
Retailer 13
-
$6,758 USD
£5,321 GBP
View
B+
Retailer 14
-
$6,987 USD
View
B+
Retailer 15
-
$7,289 USD
€6,942 EUR
View
B+
Retailer 16
-
$7,734 USD
View
B+
Retailer 17
-
$7,962 USD
€7,583 EUR
View
Retailer 18
-
$8,104 USD
View
Price last confirmed 20 days ago
B+
Retailer 19
-
$8,812 USD
ZAR 142,356 ZAR
View
Retailer 20
-
$9,407 USD
A$14,473 AUD
View
Price last confirmed 39 days ago
B
Retailer 21
-
$9,995 USD
£7,870 GBP
View
Most Expensive
Riddles Jewelry
1985031488 · Oct 25
$10,840 USD
View
Price last confirmed 7 days ago
21 more retailers have this diamond
Prices start from $5,325 USDSave up to $4,670 USD

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
$5,325 USD