Marquise|Natural|GIA

1.21ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 3545470834

Certificate GIA 3545470834

Diamond specifications and retailer prices

From $5,665 SGD
As of November 6, 2026
Save $5,438 SGD (49%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $12,605 SGD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.21ct natural marquise diamond

This 1.21ct 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 3545470834. Listed at 27 retailers as of November 2, 2026, with a 96% 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

1.21
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38.94°
Pavilion angle38.52°
OriginNatural
Grading LabGIA
CertificateGIA 3545470834
Dimensions11.52 × 5.23 × 3.31 mm
L/W Ratio2.20
Top View
11.52 mm5.23 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 3545470834
Side View
Table 57.0%Crown 38.94°Girdle: VTK-ETKPavilion 38.52°Culet: NoneDepth 63.3%

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 6
Current: $7,279 SGD|Low: $5,665 SGD|High: $11,237 SGD|Avg: $7,350 SGD|-0.9%
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
November 7, 2026
Retailer 9$5,665 SGD
Retailer 12$5,806 SGD
Retailer 3$5,954 SGD
Retailer 13$6,122 SGD
Retailer 2$6,303 SGD
Retailer 4$6,402 SGD
Retailer 11$6,827 SGD
Retailer 1$7,279 SGD
Retailer 6$7,312 SGD
Retailer 5$7,587 SGD
Retailer 7$8,187 SGD
Retailer 8$9,195 SGD
Retailer 10$11,103 SGD

37 data points across 13 retailers

27 retailers$5,665 SGD to $11,103 SGD

B+
Cheapest Retailer
-
$5,665 SGD
Retailer 2
-
$5,806 SGD
View
Price last confirmed 10 days ago
B
Retailer 3
-
$5,954 SGD
View
B
Retailer 4
-
$6,122 SGD
View
B
Retailer 5
-
$6,303 SGD
View
Final sale: no returns
B
Retailer 6
-
$6,402 SGD
View
B
Retailer 7
-
$6,753 SGD
View
Retailer 8
-
$6,827 SGD
View
Price last confirmed 47 days ago
Retailer 9
-
$6,827 SGD
View
Price last confirmed 9 days ago
Retailer 10
-
$6,827 SGD
View
Price last confirmed 30 days ago
Retailer 11
-
$6,827 SGD
View
Price last confirmed 37 days ago
Retailer 12
-
$6,827 SGD
View
Price last confirmed 30 days ago
B
Retailer 13
-
$7,279 SGD
View
B
Retailer 14
-
$7,312 SGD
View
B
Retailer 15
-
$7,344 SGD
View
B
Retailer 16
-
$7,344 SGD
View
B
Retailer 17
-
$7,587 SGD
View
Retailer 18
-
$7,587 SGD
View
Price last confirmed 34 days ago
B
Retailer 19
-
$7,728 SGD
View
Retailer 20
-
$7,878 SGD
View
Price last confirmed 29 days ago
Retailer 21
-
$7,878 SGD
View
Price last confirmed 47 days ago
B
Retailer 22
-
$8,187 SGD
View
Retailer 23
-
$8,314 SGD
View
Price last confirmed 23 days ago
B
Retailer 24
-
$9,195 SGD
View
B
Retailer 25
-
$11,103 SGD
View
Retailer 26
-
$12,605 SGD
View
Price last confirmed 48 days ago
Most Expensive
NZ Jewellers
459c1db7-adb0-4f6b-b8b4-25e2df4126ac · Sep 29
$12,605 SGD
$9,835 USD
View
Price last confirmed 38 days ago
26 more retailers have this diamond
Prices start from $5,665 SGDSave up to $5,438 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+
1.21ct Marquise
$5,665 SGD