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6.51ct H SI1 Round Natural Diamond

GD • H/SI1 • IGI 635474011

Certificate IGI 635474011

Diamond specifications and retailer prices

From $185,355 CAD
€126,372 EUR
As of October 29, 2026
2 retailers carry this diamond
Most expensive: $185,355 CAD at Yorxs
View at Yorxs

About this 6.51ct natural round diamond

This 6.51ct natural round sits in the over five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI 635474011. Listed at 2 retailers as of October 29, 2026. 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

6.51
Carat
H
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishGood
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabIGI
CertificateIGI 635474011
Dimensions11.77 × 11.72 × 7.47 mm
L/W Ratio1.00
Top View
11.77 mm11.72 mm6.51 ctH / SI1
OriginNatural
CutGood
PolishGood
SymmetryGood
FluorescenceNone
CertificateIGI 635474011
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 63.6%

Caratlytics Score

How it works →
C
Average
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Price History

Last verified: Oct 29
Current: $135,232 CAD|Low: $135,130 CAD|High: $185,355 CAD|Avg: $159,740 CAD|-0.9%
Retailer 1
Retailer 2
Yorxs
October 29, 2026
Retailer 1$135,232 CAD
Retailer 2$163,752 CAD
Yorxs$185,355 CAD

38 data points across 3 retailers

2 retailers

Retailer 1
-
$135,232 CAD
₹9,219,887 INR
Price last confirmed 15 days ago
Most Expensive
C
Yorxs
407-50A · Oct 29
$185,355 CAD
€126,372 EUR
View
1 more retailer has this diamond

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.

C
6.51ct Round
$185,355 CAD