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Marquise|Natural|GIA

1.00ct K SI2 Marquise Natural Diamond

EX • K/SI2 • GIA 1557457349

Certificate GIA 1557457349

Diamond specifications and retailer prices

From $1,387 SGD
As of November 6, 2026
Save $1,846 SGD (57%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $4,707 SGD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1557457349. Listed at 9 retailers as of November 1, 2026, with a 133% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1557457349
Dimensions9.80 × 5.22 × 3.21 mm
L/W Ratio1.88
Girdle conditionMedium to Extremely Thick
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle, Natural
Top View
9.80 mm5.22 mm1.00 ctK / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1557457349
Side View
Table 55.0%CrownGirdle: MED-XTKPavilionCulet: NoneDepth 61.5%

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 6
Current: $1,387 SGD|Low: $1,373 SGD|High: $3,639 SGD|Avg: $2,137 SGD|-12.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 1$1,387 SGD
Retailer 4$1,390 SGD
Retailer 5$1,788 SGD
Retailer 6$2,009 SGD
Retailer 2$2,341 SGD
Retailer 3$3,233 SGD

46 data points across 6 retailers

9 retailers$1,387 SGD to $3,233 SGD

A
Cheapest Retailer
-
$1,387 SGD
A
Retailer 2
-
$1,390 SGD
View
B+
Retailer 3
-
$1,788 SGD
View
Retailer 4
-
$1,930 SGD
View
Price last confirmed 29 days ago
Retailer 5
-
$2,009 SGD
View
Price last confirmed 12 days ago
Retailer 6
-
$2,019 SGD
View
Price last confirmed 36 days ago
A
Retailer 7
-
$2,341 SGD
View
B+
Retailer 8
-
$3,233 SGD
View
Most Expensive
NZ Jewellers
93982a36-b959-431d-b145-5e5ed75b9d25 · Sep 29
$4,707 SGD
$3,685 USD
View
Price last confirmed 37 days ago
8 more retailers have this diamond
Prices start from $1,387 SGDSave up to $1,846 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
1.00ct Marquise
$1,387 SGD