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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 1555183694

Certificate GIA 1555183694

Diamond specifications and retailer prices

From $673 NZD
₹36,074 INR
As of November 2, 2026
Save $2,375 NZD (78%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $3,048 NZD at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555183694. Listed at 18 retailers as of October 30, 2026, with prices from $673 to $3,048, a $2,375 spread on the same certified stone. NZ Jewellers lists it at $3,048. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1555183694
Dimensions9.37 × 4.07 × 2.42 mm
L/W Ratio2.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal
Top View
9.37 mm4.07 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1555183694
Side View
Table 61.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 59.5%

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 2
Current: $3,048 NZD|Low: $673 NZD|High: $3,048 NZD|Avg: $1,336 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 2$673 NZD
Retailer 4$896 NZD
Retailer 3$972 NZD
Retailer 13$1,047 NZD
Retailer 14$1,047 NZD
Retailer 11$1,121 NZD
Retailer 7$1,193 NZD
Retailer 9$1,227 NZD
Retailer 5$1,324 NZD
Retailer 6$1,355 NZD
Retailer 8$1,446 NZD
Retailer 12$1,500 NZD
Retailer 10$2,246 NZD
NZ Jewellers$3,048 NZD

24 data points across 14 retailers

18 retailers$673 NZD to $3,048 NZD

A
Cheapest Retailer
-
$673 NZD
₹36,074 INR
B+
Retailer 2
-
$896 NZD
$504 USD
View
Final sale: no returns
A
Retailer 3
-
$972 NZD
$547 USD
View
Retailer 4
-
$1,011 NZD
SGD 769 SGD
View
Price last confirmed 11 days ago
A
Retailer 5
-
$1,047 NZD
$589 USD
View
A
Retailer 6
-
$1,047 NZD
$589 USD
View
A
Retailer 7
-
$1,121 NZD
$631 USD
View
B+
Retailer 8
-
$1,121 NZD
$631 USD
View
B+
Retailer 9
-
$1,193 NZD
£529 GBP
View
B+
Retailer 10
-
$1,219 NZD
$686 USD
View
B+
Retailer 11
-
$1,227 NZD
£544 GBP
View
B+
Retailer 12
-
$1,324 NZD
$745 USD
View
B+
Retailer 13
-
$1,355 NZD
$763 USD
View
B+
Retailer 14
-
$1,446 NZD
€775 EUR
View
Retailer 15
-
$1,479 NZD
A$1,280 AUD
View
Price last confirmed 29 days ago
B+
Retailer 16
-
$1,500 NZD
ZAR 13,639 ZAR
View
B
Retailer 17
-
$2,246 NZD
£995 GBP
View
Most Expensive
B
NZ Jewellers
4eef1496-8124-46e6-a1a6-194cfc9e4067 · Oct 30
$3,048 NZD
$1,715 USD
View
17 more retailers have this diamond
Prices start from $673 NZDSave up to $2,375 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
$673 NZD