Marquise|Natural|GIA

1.00ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 1558052400

Certificate GIA 1558052400

Diamond specifications and retailer prices

From $3,474 USD
As of November 1, 2026
Save $893 USD (20%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $6,326 USD at NZ Jewellers · As of October 21, 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 1558052400. Listed at 17 retailers as of November 1, 2026, with a 26% 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
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558052400
Dimensions9.99 × 5.30 × 3.09 mm
L/W Ratio1.88
Culet sizeNone
Top View
9.99 mm5.30 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1558052400
Side View
Table 62.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.2%

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 1
Current: $6,326 USD|Low: $2,920 USD|High: $6,326 USD|Avg: $3,865 USD
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
November 1, 2026
Retailer 17$2,920 USD
Retailer 3$2,993 USD
Retailer 5$3,185 USD
Retailer 7$3,289 USD
Retailer 16$3,289 USD
Retailer 15$3,416 USD
Retailer 10$3,474 USD
Retailer 12$3,540 USD
Retailer 4$3,730 USD
Retailer 8$3,795 USD
Retailer 6$3,889 USD
Retailer 9$4,112 USD
Retailer 13$4,220 USD
Retailer 2$4,367 USD
Retailer 11$4,382 USD
Retailer 14$6,105 USD
NZ Jewellers$6,326 USD

35 data points across 17 retailers

17 retailers$3,474 USD to $4,367 USD

Retailer 1
-
$2,920 USD
Price last confirmed 10 days ago
Retailer 2
-
$2,993 USD
View
Price last confirmed 12 days ago
Retailer 3
-
$3,185 USD
View
Price last confirmed 10 days ago
Retailer 4
-
$3,289 USD
View
Price last confirmed 17 days ago
Retailer 5
-
$3,289 USD
View
Price last confirmed 11 days ago
Retailer 6
-
$3,304 USD
View
Price last confirmed 15 days ago
Retailer 7
-
$3,416 USD
View
Price last confirmed 16 days ago
B
Retailer 8
-
$3,474 USD
View
Retailer 9
-
$3,540 USD
£2,788 GBP
View
Price last confirmed 11 days ago
Retailer 10
-
$3,730 USD
View
Price last confirmed 12 days ago
Retailer 11
-
$3,795 USD
View
Price last confirmed 12 days ago
Retailer 12
-
$3,889 USD
A$5,983 AUD
View
Price last confirmed 24 days ago
Retailer 13
-
$4,112 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
$4,367 USD
£3,439 GBP
View
Retailer 15
-
$4,382 USD
ZAR 70,793 ZAR
View
Price last confirmed 11 days ago
Retailer 16
-
$6,105 USD
£4,807 GBP
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
3217f459-345e-46b9-83f9-6e3898b8c971 · Oct 21
$6,326 USD
View
Price last confirmed 12 days ago
16 more retailers have this diamond
Prices start from $3,474 USDSave up to $893 USD

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
$3,474 USD