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Marquise|Natural|GIA

0.51ct K SI2 Marquise Natural Diamond

GD • K/SI2 • GIA 6194969419

Certificate GIA 6194969419

Diamond specifications and retailer prices

From $1,028 NZD
As of November 1, 2026
Save $1,723 NZD (63%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,739 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6194969419. Listed at 12 retailers as of November 1, 2026, with a 168% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6194969419
Dimensions7.54 × 4.39 × 2.65 mm
L/W Ratio1.72
Top View
7.54 mm4.39 mm0.51 ctK / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6194969419
Side View
Table 55.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 60.4%

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 1
Current: $3,739 NZD|Low: $1,028 NZD|High: $3,739 NZD|Avg: $1,652 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 5$1,028 NZD
Retailer 7$1,081 NZD
Retailer 10$1,124 NZD
Retailer 6$1,164 NZD
Retailer 9$1,164 NZD
Retailer 8$1,246 NZD
Retailer 3$1,456 NZD
Retailer 2$1,591 NZD
Retailer 4$2,751 NZD
NZ Jewellers$3,739 NZD

41 data points across 10 retailers

12 retailers$1,028 NZD to $2,751 NZD

B+
Cheapest Retailer
-
$1,028 NZD
B+
Retailer 2
-
$1,081 NZD
View
B+
Retailer 3
-
$1,117 NZD
View
B+
Retailer 4
-
$1,124 NZD
View
Retailer 5
-
$1,164 NZD
View
Price last confirmed 9 days ago
B
Retailer 6
-
$1,164 NZD
View
B
Retailer 7
-
$1,246 NZD
View
B
Retailer 8
-
$1,320 NZD
View
B
Retailer 9
-
$1,456 NZD
View
B
Retailer 10
-
$1,591 NZD
View
C
Retailer 11
-
$2,751 NZD
View
Most Expensive
NZ Jewellers
a755aec9-ce16-4e04-8139-e7b5f382ec80 · Nov 5
$3,739 NZD
$2,073 USD
View
Price under review
11 more retailers have this diamond
Prices start from $1,028 NZDSave up to $1,723 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.

B+
0.51ct Marquise
$1,028 NZD