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Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 6551764597

Certificate GIA 6551764597

Diamond specifications and retailer prices

From $980 NZD
As of November 3, 2026
Save $2,093 NZD (68%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,072 NZD at NZ Jewellers · As of November 3, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551764597. Listed at 6 retailers as of November 3, 2026, with prices from $980 to $3,072, a $2,093 spread on the same certified stone. NZ Jewellers lists it at $3,072. 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

0.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551764597
Dimensions7.98 × 3.83 × 2.38 mm
L/W Ratio2.08
Girdle conditionThick
Key to symbols
Twinning Wisp
Top View
7.98 mm3.83 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551764597
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 62.2%

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 3
Current: $3,072 NZD|Low: $980 NZD|High: $3,146 NZD|Avg: $1,692 NZD|-2.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4$980 NZD
Retailer 6$1,055 NZD
Retailer 2$1,169 NZD
Retailer 5$1,288 NZD
Retailer 3$2,260 NZD
NZ Jewellers$3,072 NZD

28 data points across 6 retailers

6 retailers$980 NZD to $3,072 NZD

A
Cheapest Retailer
-
$980 NZD
A
Retailer 2
-
$1,055 NZD
View
A
Retailer 3
-
$1,169 NZD
View
B+
Retailer 4
-
$1,288 NZD
View
B
Retailer 5
-
$2,260 NZD
View
Most Expensive
B
NZ Jewellers
c3f34689-ff0b-44b5-8d2f-fa347761345c · Nov 3
$3,072 NZD
$1,703 USD
View
5 more retailers have this diamond
Prices start from $980 NZDSave up to $2,093 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
$980 NZD