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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 $484 SGD
₹36,074 INR
As of November 2, 2026
Save $1,709 SGD (78%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,193 SGD 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 $484 to $2,193, a $1,709 spread on the same certified stone. NZ Jewellers lists it at $2,193. 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: $2,193 SGD|Low: $484 SGD|High: $2,193 SGD|Avg: $961 SGD
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$484 SGD
Retailer 4$645 SGD
Retailer 3$700 SGD
Retailer 13$753 SGD
Retailer 14$753 SGD
Retailer 11$807 SGD
Retailer 7$859 SGD
Retailer 9$883 SGD
Retailer 5$953 SGD
Retailer 6$975 SGD
Retailer 8$1,041 SGD
Retailer 12$1,080 SGD
Retailer 10$1,616 SGD
NZ Jewellers$2,193 SGD

24 data points across 14 retailers

18 retailers$484 SGD to $2,193 SGD

A
Cheapest Retailer
-
$484 SGD
₹36,074 INR
B+
Retailer 2
-
$645 SGD
$504 USD
View
Final sale: no returns
A
Retailer 3
-
$700 SGD
$547 USD
View
Retailer 4
-
$728 SGD
View
Price last confirmed 11 days ago
A
Retailer 5
-
$753 SGD
$589 USD
View
A
Retailer 6
-
$753 SGD
$589 USD
View
A
Retailer 7
-
$807 SGD
$631 USD
View
B+
Retailer 8
-
$807 SGD
$631 USD
View
B+
Retailer 9
-
$859 SGD
£529 GBP
View
B+
Retailer 10
-
$877 SGD
$686 USD
View
B+
Retailer 11
-
$883 SGD
£544 GBP
View
B+
Retailer 12
-
$953 SGD
$745 USD
View
B+
Retailer 13
-
$975 SGD
$763 USD
View
B+
Retailer 14
-
$1,041 SGD
€775 EUR
View
Retailer 15
-
$1,064 SGD
A$1,280 AUD
View
Price last confirmed 29 days ago
B+
Retailer 16
-
$1,080 SGD
ZAR 13,639 ZAR
View
B
Retailer 17
-
$1,616 SGD
£995 GBP
View
Most Expensive
B
NZ Jewellers
4eef1496-8124-46e6-a1a6-194cfc9e4067 · Oct 30
$2,193 SGD
$1,715 USD
View
17 more retailers have this diamond
Prices start from $484 SGDSave up to $1,709 SGD

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
$484 SGD