Round|Natural|GIA

6.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2544916426

Certificate GIA 2544916426

Diamond specifications and retailer prices

From $115,250 CAD
$82,504 USD
As of October 31, 2026
Save $28,968 CAD (20%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $156,905 CAD at Yorxs · As of October 22, 2026
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 top-tier cut grade and certified by GIA 2544916426. Listed at 9 retailers as of October 30, 2026, with a 25% 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

6.51
Carat
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle34.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2544916426
Dimensions11.83 × 11.93 × 7.46 mm
L/W Ratio1.01
Star length50%
Top View
11.83 mm11.93 mm6.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2544916426
Side View
Table 59.0%Crown 34.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.8%

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 31
Current: $121,023 CAD|Low: $115,250 CAD|High: $157,264 CAD|Avg: $131,425 CAD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Yorxs
October 31, 2026
Retailer 5$115,250 CAD
Retailer 3$119,985 CAD
Retailer 1$121,023 CAD
Retailer 4$126,879 CAD
Retailer 2$144,218 CAD
Yorxs$156,905 CAD

39 data points across 6 retailers

9 retailers$115,250 CAD to $144,218 CAD

A
Cheapest Retailer
-
$115,250 CAD
$82,504 USD
Retailer 2
-
$119,290 CAD
$85,396 USD
View
Price last confirmed 9 days ago
Retailer 3
-
$119,985 CAD
₹8,180,371 INR
View
Price last confirmed 9 days ago
Retailer 4
-
$120,407 CAD
$86,196 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$121,023 CAD
$86,637 USD
View
Retailer 6
-
$126,879 CAD
$90,829 USD
View
Price last confirmed 12 days ago
Retailer 7
-
$133,436 CAD
$95,523 USD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$144,218 CAD
£81,293 GBP
View
Most Expensive
Yorxs
530201343 · Oct 22
$156,905 CAD
€106,975 EUR
View
Price last confirmed 9 days ago
8 more retailers have this diamond
Prices start from $115,250 CADSave up to $28,968 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
$115,250 CAD