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Round|Natural|GIA

6.51ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 7511165306

Certificate GIA 7511165306

Diamond specifications and retailer prices

From $213,168 CAD
$152,601 USD
As of October 28, 2026
Save $172,627 CAD (45%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $385,795 CAD at MOH London · As of October 29, 2026
View at MOH London

About this 6.51ct natural round diamond

This 6.51ct natural round sits in the over five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7511165306. Listed at 18 retailers as of October 28, 2026, with prices from $213,168 to $385,795, a $172,627 spread on the same certified stone. MOH London lists it at $385,795. 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

6.51
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 7511165306
Dimensions11.87 × 11.80 × 7.49 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Knot, Feather, Indented Natural, Needle, Natural
Top View
11.87 mm11.80 mm6.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7511165306
Side View
Table 58.0%Crown 35°Girdle: ThickPavilion 41.6°Culet: NoneDepth 63.2%

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: Oct 28
Current: $385,795 CAD|Low: $210,666 CAD|High: $388,364 CAD|Avg: $262,168 CAD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 6$210,666 CAD
Retailer 10$220,611 CAD
Retailer 8$223,793 CAD
Retailer 7$228,834 CAD
Retailer 9$237,082 CAD
Retailer 2$239,521 CAD
Retailer 4$258,137 CAD
Retailer 3$290,558 CAD
Retailer 5$295,718 CAD
MOH London$385,795 CAD

41 data points across 10 retailers

18 retailers$213,168 CAD to $385,795 CAD

A
Cheapest Retailer
-
$213,168 CAD
$152,601 USD
B+
Retailer 2
-
$220,611 CAD
$157,929 USD
View
B+
Retailer 3
-
$220,966 CAD
$158,183 USD
View
B+
Retailer 4
-
$223,793 CAD
$160,207 USD
View
Retailer 5
-
$228,834 CAD
A$252,024 AUD
View
Price last confirmed 27 days ago
B+
Retailer 6
-
$237,082 CAD
$169,720 USD
View
B+
Retailer 7
-
$239,521 CAD
£135,012 GBP
View
Retailer 8
-
$245,709 CAD
$175,896 USD
View
Price last confirmed 15 days ago
B+
Retailer 9
-
$252,587 CAD
$180,820 USD
View
B+
Retailer 10
-
$252,587 CAD
$180,820 USD
View
Retailer 11
-
$255,947 CAD
$183,225 USD
View
Price last confirmed 35 days ago
B+
Retailer 12
-
$258,137 CAD
£145,506 GBP
View
B+
Retailer 13
-
$261,011 CAD
$186,850 USD
View
Retailer 14
-
$266,185 CAD
$190,554 USD
View
Price last confirmed 38 days ago
Retailer 15
-
$276,423 CAD
$197,883 USD
View
Price last confirmed 39 days ago
B+
Retailer 16
-
$290,558 CAD
€198,097 EUR
View
B+
Retailer 17
-
$295,718 CAD
ZAR 3,419,970 ZAR
View
Most Expensive
B
MOH London
20FBA816C · Oct 29
$385,795 CAD
£217,464 GBP
View
17 more retailers have this diamond
Prices start from $213,168 CADSave up to $172,627 CAD

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
6.51ct Round
$213,168 CAD