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Marquise|Natural|GIA

1.00ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 2564091915

Certificate GIA 2564091915

Diamond specifications and retailer prices

From $2,715 SGD
$2,123 USD
As of October 30, 2026
Save $3,569 SGD (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $6,543 SGD at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-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 2564091915. Listed at 19 retailers as of October 27, 2026, with a 131% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2564091915
Dimensions10.08 × 5.30 × 3.07 mm
L/W Ratio1.90
Key to symbols
Twinning Wisp, Indented Natural, Natural
Top View
10.08 mm5.30 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2564091915
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NDepth 58.0%

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: Oct 30
Current: $6,285 SGD|Low: $2,595 SGD|High: $6,543 SGD|Avg: $3,679 SGD|-3.9%
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
Retailer 15
October 30, 2026
Retailer 15$2,715 SGD
Retailer 3$2,773 SGD
Retailer 7$2,885 SGD
Retailer 11$3,005 SGD
Retailer 12$3,005 SGD
Retailer 14$3,005 SGD
Retailer 5$3,145 SGD
Retailer 2$3,299 SGD
Retailer 13$3,468 SGD
Retailer 4$3,490 SGD
Retailer 8$3,516 SGD
Retailer 9$3,660 SGD
Retailer 6$3,777 SGD
Retailer 10$5,274 SGD
NZ Jewellers$6,285 SGD

41 data points across 15 retailers

19 retailers$2,715 SGD to $6,285 SGD

A
Cheapest Retailer
-
$2,715 SGD
$2,123 USD
A
Retailer 2
-
$2,773 SGD
$2,168 USD
View
Final sale: no returns
A
Retailer 3
-
$2,885 SGD
$2,256 USD
View
A
Retailer 4
-
$3,005 SGD
$2,350 USD
View
B+
Retailer 5
-
$3,005 SGD
$2,350 USD
View
A
Retailer 6
-
$3,005 SGD
$2,350 USD
View
Retailer 7
-
$3,129 SGD
$2,447 USD
View
Price last confirmed 41 days ago
B+
Retailer 8
-
$3,145 SGD
$2,459 USD
View
B+
Retailer 9
-
$3,224 SGD
A$3,878 AUD
View
B+
Retailer 10
-
$3,299 SGD
£2,031 GBP
View
B+
Retailer 11
-
$3,468 SGD
$2,712 USD
View
B+
Retailer 12
-
$3,490 SGD
$2,729 USD
View
B+
Retailer 13
-
$3,516 SGD
€2,618 EUR
View
Retailer 14
-
$3,612 SGD
$2,824 USD
View
Price last confirmed 39 days ago
Retailer 15
-
$3,660 SGD
ZAR 46,236 ZAR
View
Price last confirmed 7 days ago
Retailer 16
-
$3,777 SGD
A$4,543 AUD
View
Price last confirmed 25 days ago
Retailer 17
-
$5,274 SGD
£3,247 GBP
View
Price last confirmed 7 days ago
B
Retailer 18
-
$6,285 SGD
$4,914 USD
View
Most Expensive
NZ Jewellers
31d49e0b-4810-4c2f-a3ed-6c7ff2302b66 · Sep 20
$6,543 SGD
$5,116 USD
View
Price last confirmed 42 days ago
18 more retailers have this diamond
Prices start from $2,715 SGDSave up to $3,569 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
$2,715 SGD