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Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 2556632974

Certificate GIA 2556632974

Diamond specifications and retailer prices

From $650 CAD
As of November 4, 2026
Save $158 CAD (20%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $808 CAD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2556632974. Listed at 4 retailers as of November 4, 2026, with prices from $650 to $808, a $158 spread on the same certified stone. 77 Diamonds lists it at $808. 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

0.51
Carat
I
Color
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2556632974
Dimensions7.75 × 4.20 × 2.66 mm
L/W Ratio1.85
Culet sizeNone
Key to symbols
Cloud, Twinning Wisp
Top View
7.75 mm4.20 mm0.51 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2556632974
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.2%

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: Nov 4
Current: $808 CAD|Low: $554 CAD|High: $824 CAD|Avg: $705 CAD|+0.6%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3$650 CAD
Retailer 2$661 CAD
Retailer 4$702 CAD
77 Diamonds$808 CAD

41 data points across 4 retailers

4 retailers$650 CAD to $808 CAD

B+
Cheapest Retailer
-
$650 CAD
Final sale: no returns
B+
Retailer 2
-
$661 CAD
View
B+
Retailer 3
-
$702 CAD
View
Most Expensive
B+
77 Diamonds
MQCPQFBAERBW · Nov 6
$808 CAD
£452 GBP
View
3 more retailers have this diamond
Prices start from $650 CADSave up to $158 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.

B+
0.51ct Marquise
$650 CAD