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Marquise|Natural|GIA

1.00ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6551185021

Certificate GIA 6551185021

Diamond specifications and retailer prices

From $4,893 SGD
As of November 5, 2026
Save $6,017 SGD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $10,911 SGD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551185021. Listed at 21 retailers as of November 5, 2026, with prices from $4,893 to $10,911, a $6,017 spread on the same certified stone. NZ Jewellers lists it at $10,911. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551185021
Dimensions10.31 × 5.06 × 3.18 mm
L/W Ratio2.04
Girdle conditionFaceted
Culet sizeNone
Top View
10.31 mm5.06 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551185021
Side View
Table 56.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 62.8%

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 5
Current: $10,911 SGD|Low: $4,993 SGD|High: $10,911 SGD|Avg: $6,812 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
November 6, 2026
Retailer 9$4,993 SGD
Retailer 12$5,329 SGD
Retailer 4$5,356 SGD
Retailer 11$5,377 SGD
Retailer 3$5,674 SGD
Retailer 13$5,674 SGD
Retailer 2$6,128 SGD
Retailer 5$6,180 SGD
Retailer 10$6,312 SGD
Retailer 8$7,057 SGD
Retailer 6$7,641 SGD
Retailer 7$9,946 SGD
NZ Jewellers$10,911 SGD

46 data points across 13 retailers

21 retailers$4,893 SGD to $10,911 SGD

B+
Cheapest Retailer
-
$4,893 SGD
B+
Retailer 2
-
$4,993 SGD
View
B+
Retailer 3
-
$5,178 SGD
View
B+
Retailer 4
-
$5,329 SGD
View
B+
Retailer 5
-
$5,356 SGD
View
B+
Retailer 6
-
$5,377 SGD
View
Retailer 7
-
$5,674 SGD
View
Price last confirmed 8 days ago
B
Retailer 8
-
$5,674 SGD
View
B
Retailer 9
-
$5,674 SGD
View
B+
Retailer 10
-
$6,128 SGD
View
B
Retailer 11
-
$6,180 SGD
View
Retailer 12
-
$6,312 SGD
View
Price last confirmed 28 days ago
B
Retailer 13
-
$6,374 SGD
View
B
Retailer 14
-
$6,374 SGD
View
B
Retailer 15
-
$6,546 SGD
View
B
Retailer 16
-
$6,591 SGD
View
Retailer 17
-
$6,915 SGD
View
Price last confirmed 14 days ago
B
Retailer 18
-
$7,057 SGD
View
B
Retailer 19
-
$7,641 SGD
View
B
Retailer 20
-
$9,946 SGD
View
Most Expensive
B
NZ Jewellers
f3e8fe6d-4665-4962-b68a-9e5acc960959 · Nov 5
$10,911 SGD
$8,542 USD
View
20 more retailers have this diamond
Prices start from $4,893 SGDSave up to $6,017 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.

B+
1.00ct Marquise
$4,893 SGD