Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

ID • H/SI1 • GIA 2557359146

Certificate GIA 2557359146

Diamond specifications and retailer prices

From $7,137 SGD
As of November 5, 2026
Save $1,225 SGD (15%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $13,224 SGD at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded H 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 2557359146. Listed at 20 retailers as of November 5, 2026, with a relatively tight 17% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.20
Carat
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.24°
Pavilion angle41.41°
OriginNatural
Grading LabGIA
CertificateGIA 2557359146
Dimensions10.40 × 5.52 × 3.52 mm
L/W Ratio1.88
Girdle conditionVery Thick
Key to symbols
Crystal, Feather, Needle, Indented Natural
Top View
10.40 mm5.52 mm1.20 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557359146
Side View
Table 63.0%Crown 38.24°Girdle: Slightly ThickPavilion 41.41°Culet: NoneDepth 63.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: $13,224 SGD|Low: $6,247 SGD|High: $13,224 SGD|Avg: $7,949 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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
November 6, 2026
Retailer 7$6,247 SGD
Retailer 6$6,294 SGD
Retailer 4$6,299 SGD
Retailer 15$6,434 SGD
Retailer 22$6,667 SGD
Retailer 23$6,703 SGD
Retailer 12$7,076 SGD
Retailer 9$7,137 SGD
Retailer 3$7,163 SGD
Retailer 19$7,163 SGD
Retailer 21$7,163 SGD
Retailer 16$7,451 SGD
Retailer 10$7,527 SGD
Retailer 17$7,538 SGD
Retailer 20$7,720 SGD
Retailer 2$7,805 SGD
Retailer 11$8,362 SGD
Retailer 18$8,593 SGD
Retailer 14$8,720 SGD
Retailer 13$9,627 SGD
Retailer 8$11,570 SGD
Retailer 5$11,663 SGD
NZ Jewellers$13,224 SGD

9 data points across 23 retailers

20 retailers$7,137 SGD to $8,362 SGD

Retailer 1
-
$6,247 SGD
Price last confirmed 12 days ago
Retailer 2
-
$6,294 SGD
View
Price last confirmed 12 days ago
Retailer 3
-
$6,299 SGD
View
Price last confirmed 13 days ago
Retailer 4
-
$6,667 SGD
View
Price last confirmed 13 days ago
Retailer 5
-
$6,703 SGD
View
Price last confirmed 11 days ago
Retailer 6
-
$7,076 SGD
View
Price last confirmed 13 days ago
B
Retailer 7
-
$7,137 SGD
View
Retailer 8
-
$7,163 SGD
View
Price last confirmed 12 days ago
Retailer 9
-
$7,163 SGD
View
Price last confirmed 13 days ago
Retailer 10
-
$7,163 SGD
View
Price last confirmed 13 days ago
B
Retailer 11
-
$7,527 SGD
View
Retailer 12
-
$7,538 SGD
View
Price last confirmed 11 days ago
Retailer 13
-
$7,805 SGD
View
B
Retailer 14
-
$8,362 SGD
View
Retailer 15
-
$8,593 SGD
View
Price last confirmed 12 days ago
Retailer 16
-
$8,720 SGD
View
Price last confirmed 29 days ago
Retailer 17
-
$9,627 SGD
View
Price last confirmed 11 days ago
Retailer 18
-
$11,570 SGD
View
Price last confirmed 15 days ago
Retailer 19
-
$11,663 SGD
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
1844168c-8e69-4a0c-b643-6b09d37bb58f · Oct 24
$13,224 SGD
$10,318 USD
View
Price under review
19 more retailers have this diamond
Prices start from $7,137 SGDSave up to $1,225 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
1.20ct Marquise
$7,137 SGD