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Oval|Natural|GIA

6.50ct G SI1 Oval Natural Diamond

ID • G/SI1 • GIA 6552542988

Certificate GIA 6552542988

Diamond specifications and retailer prices

From $280,529 NZD
$157,840 USD
As of October 28, 2026
Save $225,384 NZD (45%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $505,913 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 6.5ct natural oval diamond

This 6.5ct natural oval sits in the over five 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 6552542988. Listed at 21 retailers as of October 28, 2026, with prices from $280,529 to $505,913, a $225,384 spread on the same certified stone. MOH London lists it at $505,913. 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

6.50
Carat
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle42.37°
Pavilion angle37.64°
OriginNatural
Grading LabGIA
CertificateGIA 6552542988
Dimensions14.27 × 10.18 × 6.55 mm
L/W Ratio1.40
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
14.27 mm10.18 mm6.50 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6552542988
Side View
Table 65.0%Crown 42.37°Girdle: STK-VTKPavilion 37.64°Culet: NoneDepth 64.3%

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: Oct 28
Current: $505,913 NZD|Low: $235,957 NZD|High: $508,622 NZD|Avg: $309,987 NZD|+18.9%
MOH London
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
Retailer 22
Retailer 23
Retailer 24
November 2, 2026
Retailer 14$235,957 NZD
Retailer 12$251,083 NZD
Retailer 10$256,073 NZD
Retailer 15$257,677 NZD
Retailer 21$280,529 NZD
Retailer 17$288,187 NZD
Retailer 16$288,843 NZD
Retailer 3$290,816 NZD
Retailer 9$291,543 NZD
Retailer 7$295,042 NZD
Retailer 11$296,270 NZD
Retailer 5$312,547 NZD
Retailer 19$317,362 NZD
Retailer 4$323,938 NZD
Retailer 23$337,435 NZD
Retailer 24$337,435 NZD
Retailer 8$338,924 NZD
Retailer 2$349,560 NZD
Retailer 22$350,931 NZD
Retailer 6$364,428 NZD
Retailer 13$381,569 NZD
Retailer 18$391,951 NZD
Retailer 20$400,872 NZD
MOH London$505,913 NZD

26 data points across 24 retailers

21 retailers$280,529 NZD to $505,913 NZD

Retailer 1
-
$235,957 NZD
HK$1,037,200 HKD
Price last confirmed 27 days ago
Retailer 2
-
$251,083 NZD
A$217,342 AUD
View
Price last confirmed 30 days ago
B+
Retailer 3
-
$280,529 NZD
$157,840 USD
View
Retailer 4
-
$288,843 NZD
$162,518 USD
View
Price last confirmed 30 days ago
B+
Retailer 5
-
$290,816 NZD
$163,628 USD
View
B
Retailer 6
-
$291,543 NZD
$164,037 USD
View
Final sale: no returns
B+
Retailer 7
-
$295,042 NZD
$166,006 USD
View
Retailer 8
-
$302,964 NZD
$170,463 USD
View
Price last confirmed 62 days ago
B
Retailer 9
-
$312,547 NZD
$175,855 USD
View
B+
Retailer 10
-
$317,362 NZD
£140,602 GBP
View
Retailer 11
-
$323,938 NZD
$182,264 USD
View
Price last confirmed 8 days ago
B
Retailer 12
-
$337,435 NZD
$189,858 USD
View
B
Retailer 13
-
$337,435 NZD
$189,858 USD
View
B
Retailer 14
-
$338,924 NZD
$190,696 USD
View
B
Retailer 15
-
$349,560 NZD
£154,866 GBP
View
B
Retailer 16
-
$350,931 NZD
$197,452 USD
View
B
Retailer 17
-
$364,428 NZD
$205,046 USD
View
B
Retailer 18
-
$381,569 NZD
€204,467 EUR
View
B
Retailer 19
-
$391,951 NZD
ZAR 3,562,706 ZAR
View
B
Retailer 20
-
$400,872 NZD
$225,551 USD
View
Most Expensive
B
MOH London
219EBFA70 · Nov 1
$505,913 NZD
£224,136 GBP
View
20 more retailers have this diamond
Prices start from $280,529 NZDSave up to $225,384 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.

B+
6.50ct Oval
$280,529 NZD