Marquise|Natural|GIA

1.01ct I SI1 Marquise Natural Diamond

ID • I/SI1 • GIA 1559004511

Certificate GIA 1559004511

Diamond specifications and retailer prices

From $1,940 USD
£1,527 GBP
As of November 2, 2026
Save $2,910 USD (60%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $4,850 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.01ct natural marquise diamond

This 1.01ct 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 1559004511. Listed at 8 retailers as of October 30, 2026, with prices from $1,940 to $4,850, a $2,910 spread on the same certified stone. NZ Jewellers lists it at $4,850. 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

1.01
Carat
I
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle42.17°
Pavilion angle40.84°
OriginNatural
Grading LabGIA
CertificateGIA 1559004511
Dimensions9.13 × 5.13 × 3.48 mm
L/W Ratio1.78
Girdle conditionVery Thick
Key to symbols
Crystal, Feather
Top View
9.13 mm5.13 mm1.01 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1559004511
Side View
Table 61.0%Crown 42.17°Girdle: Very ThickPavilion 40.84°Culet: NoneDepth 67.8%

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: Nov 2
Current: $4,850 USD|Low: $1,940 USD|High: $4,900 USD|Avg: $2,654 USD|+9.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 2$1,940 USD
Retailer 7$1,988 USD
Retailer 4$2,025 USD
Retailer 5$2,080 USD
Retailer 6$2,123 USD
Retailer 9$2,150 USD
Retailer 8$2,552 USD
Retailer 3$3,484 USD
NZ Jewellers$4,850 USD

38 data points across 9 retailers

8 retailers$1,940 USD to $4,850 USD

A
Cheapest Retailer
-
$1,940 USD
£1,527 GBP
A
Retailer 2
-
$1,988 USD
View
A
Retailer 3
-
$2,025 USD
View
A
Retailer 4
-
$2,080 USD
View
A
Retailer 5
-
$2,123 USD
View
Retailer 6
-
$2,552 USD
A$3,926 AUD
View
Price last confirmed 27 days ago
B+
Retailer 7
-
$3,484 USD
£2,743 GBP
View
Most Expensive
B
NZ Jewellers
52a5c3ca-3245-41f7-813a-018c244f3885 · Oct 30
$4,850 USD
View
7 more retailers have this diamond
Prices start from $1,940 USDSave up to $2,910 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.

A
1.01ct Marquise
$1,940 USD