CaratHunter
Plans
Marquise|Natural|GIA

0.51ct I IF Marquise Natural Diamond

GD • I/IF • GIA 2556513837

Certificate GIA 2556513837

Diamond specifications and retailer prices

From $1,299 NZD
As of November 6, 2026
Save $316 NZD (20%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,614 NZD at Blue Nile · As of November 5, 2026
View at Blue Nile

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 IF clarity (flawless or internally-flawless), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2556513837. Listed at 5 retailers as of November 5, 2026, with prices from $1,299 to $1,614, a $316 spread on the same certified stone. Blue Nile lists it at $1,614. 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
Colour
IF
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556513837
Dimensions8.11 × 4.21 × 2.66 mm
L/W Ratio1.93
Culet sizeNone
Key to symbols
Minor Details of Polish
Top View
8.11 mm4.21 mm0.51 ctI / IF
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556513837
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: 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: Nov 6
Current: $1,614 NZD|Low: $1,113 NZD|High: $1,706 NZD|Avg: $1,432 NZD|-5.4%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 5$1,299 NZD
Retailer 4$1,306 NZD
Retailer 3$1,425 NZD
Retailer 2$1,526 NZD
Blue Nile$1,614 NZD

39 data points across 5 retailers

5 retailers$1,299 NZD to $1,614 NZD

A
Cheapest Retailer
-
$1,299 NZD
A
Retailer 2
-
$1,306 NZD
View
Final sale: no returns
A
Retailer 3
-
$1,425 NZD
View
B+
Retailer 4
-
$1,526 NZD
View
Most Expensive
B+
Blue Nile
29422953 · Nov 5
$1,614 NZD
$895 USD
View
4 more retailers have this diamond
Prices start from $1,299 NZDSave up to $316 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.

A
0.51ct Marquise
$1,299 NZD