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Marquise|Natural|GIA

1.00ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 1549818428

Certificate GIA 1549818428

Diamond specifications and retailer prices

From $4,361 SGD
$3,410 USD
As of November 1, 2026
Save $4,790 SGD (52%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $9,533 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 G 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 1549818428. Listed at 17 retailers as of November 1, 2026, with a 110% 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1549818428
Dimensions10.01 × 5.23 × 3.24 mm
L/W Ratio1.91
Key to symbols
Feather, Cloud, Crystal, Indented Natural, Natural
Top View
10.01 mm5.23 mm1.00 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1549818428
Side View
Table 58.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 61.9%

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 1
Current: $5,337 SGD|Low: $4,361 SGD|High: $9,261 SGD|Avg: $5,818 SGD|-0.6%
Retailer 1
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 13$4,361 SGD
Retailer 12$4,656 SGD
Retailer 11$4,738 SGD
Retailer 5$4,957 SGD
Retailer 1$5,337 SGD
Retailer 8$5,598 SGD
Retailer 3$5,602 SGD
Retailer 4$5,602 SGD
Retailer 2$5,781 SGD
Retailer 14$5,873 SGD
Retailer 7$6,191 SGD
Retailer 6$6,191 SGD
Retailer 10$6,726 SGD
Retailer 9$9,151 SGD

19 data points across 14 retailers

17 retailers$4,361 SGD to $9,151 SGD

B+
Cheapest Retailer
-
$4,361 SGD
$3,410 USD
B+
Retailer 2
-
$4,656 SGD
$3,641 USD
View
B+
Retailer 3
-
$4,738 SGD
$3,705 USD
View
Retailer 4
-
$4,957 SGD
$3,876 USD
View
Price last confirmed 32 days ago
Retailer 5
-
$5,148 SGD
$4,025 USD
View
Price last confirmed 33 days ago
B+
Retailer 6
-
$5,337 SGD
£3,286 GBP
View
B+
Retailer 7
-
$5,598 SGD
£3,447 GBP
View
B
Retailer 8
-
$5,602 SGD
$4,380 USD
View
B
Retailer 9
-
$5,602 SGD
$4,380 USD
View
Retailer 10
-
$5,721 SGD
$4,473 USD
View
Price last confirmed 34 days ago
B
Retailer 11
-
$5,781 SGD
$4,520 USD
View
Retailer 12
-
$5,873 SGD
A$7,065 AUD
View
Price last confirmed 31 days ago
B
Retailer 13
-
$6,191 SGD
€4,610 EUR
View
Retailer 14
-
$6,191 SGD
$4,841 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
$6,726 SGD
ZAR 84,964 ZAR
View
B
Retailer 16
-
$9,151 SGD
£5,634 GBP
View
Most Expensive
NZ Jewellers
814ae926-9ab3-4cd7-8ec7-86528d4e2e8f · Sep 29
$9,533 SGD
$7,454 USD
View
Price last confirmed 34 days ago
16 more retailers have this diamond
Prices start from $4,361 SGDSave up to $4,790 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
$4,361 SGD