Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

ID • H/SI1 • GIA 2557359146

Certificate GIA 2557359146

Diamond specifications and retailer prices

From $10,046 NZD
As of November 5, 2026
Save $1,725 NZD (15%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $18,613 NZD 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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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $18,613 NZD|Low: $8,792 NZD|High: $18,613 NZD|Avg: $11,189 NZD
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$8,792 NZD
Retailer 6$8,859 NZD
Retailer 4$8,866 NZD
Retailer 15$9,056 NZD
Retailer 22$9,384 NZD
Retailer 23$9,434 NZD
Retailer 12$9,959 NZD
Retailer 9$10,046 NZD
Retailer 3$10,082 NZD
Retailer 19$10,082 NZD
Retailer 21$10,082 NZD
Retailer 16$10,488 NZD
Retailer 10$10,594 NZD
Retailer 17$10,611 NZD
Retailer 20$10,867 NZD
Retailer 2$10,986 NZD
Retailer 11$11,770 NZD
Retailer 18$12,095 NZD
Retailer 14$12,274 NZD
Retailer 13$13,551 NZD
Retailer 8$16,286 NZD
Retailer 5$16,415 NZD
NZ Jewellers$18,613 NZD

9 data points across 23 retailers

20 retailers$10,046 NZD to $11,770 NZD

Retailer 1
-
$8,792 NZD
Price last confirmed 12 days ago
Retailer 2
-
$8,859 NZD
View
Price last confirmed 12 days ago
Retailer 3
-
$8,866 NZD
View
Price last confirmed 13 days ago
Retailer 4
-
$9,384 NZD
View
Price last confirmed 13 days ago
Retailer 5
-
$9,434 NZD
View
Price last confirmed 11 days ago
Retailer 6
-
$9,959 NZD
View
Price last confirmed 13 days ago
B
Retailer 7
-
$10,046 NZD
View
Retailer 8
-
$10,082 NZD
View
Price last confirmed 12 days ago
Retailer 9
-
$10,082 NZD
View
Price last confirmed 13 days ago
Retailer 10
-
$10,082 NZD
View
Price last confirmed 13 days ago
B
Retailer 11
-
$10,594 NZD
View
Retailer 12
-
$10,611 NZD
View
Price last confirmed 11 days ago
B
Retailer 13
-
$10,986 NZD
View
B
Retailer 14
-
$11,770 NZD
View
Retailer 15
-
$12,095 NZD
View
Price last confirmed 12 days ago
Retailer 16
-
$12,274 NZD
View
Price last confirmed 29 days ago
Retailer 17
-
$13,551 NZD
View
Price last confirmed 11 days ago
Retailer 18
-
$16,286 NZD
View
Price last confirmed 15 days ago
Retailer 19
-
$16,415 NZD
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
1844168c-8e69-4a0c-b643-6b09d37bb58f · Oct 24
$18,613 NZD
$10,318 USD
View
Price under review
19 more retailers have this diamond
Prices start from $10,046 NZDSave up to $1,725 NZD

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
$10,046 NZD