Marquise|Natural|GIA

1.01ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 1232918661

Certificate GIA 1232918661

Diamond specifications and retailer prices

From £1,656 GBP
As of November 4, 2026
Save £1,966 GBP (54%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,539 GBP at NZ Jewellers · As of October 3, 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 J 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 1232918661. Listed at 20 retailers as of November 4, 2026, with a 119% 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

1.01
Carat
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1232918661
Dimensions9.71 × 5.36 × 3.42 mm
L/W Ratio1.81
Culet sizeNone
Key to symbols
Knot, Twinning Wisp, Feather
Top View
9.71 mm5.36 mm1.01 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1232918661
Side View
Table 59.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 63.8%

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 4
Current: £2,298 GBP|Low: £1,656 GBP|High: £3,674 GBP|Avg: £2,260 GBP|+2.9%
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
Retailer 14
Retailer 15
November 5, 2026
Retailer 3£1,656 GBP
Retailer 7£1,762 GBP
Retailer 12£1,815 GBP
Retailer 4£1,942 GBP
Retailer 2£1,967 GBP
Retailer 15£1,967 GBP
Retailer 9£2,114 GBP
Retailer 14£2,270 GBP
Retailer 1£2,298 GBP
Retailer 13£2,433 GBP
Retailer 6£2,467 GBP
Retailer 5£2,521 GBP
Retailer 10£2,540 GBP
Retailer 11£2,669 GBP
Retailer 8£3,621 GBP

26 data points across 15 retailers

20 retailers£1,656 GBP to £3,621 GBP

B+
Cheapest Retailer
-
£1,656 GBP
B+
Retailer 2
-
£1,762 GBP
View
B+
Retailer 3
-
£1,815 GBP
View
Final sale: no returns
B+
Retailer 4
-
£1,942 GBP
View
Retailer 5
-
£1,967 GBP
View
Price last confirmed 46 days ago
Retailer 6
-
£1,967 GBP
View
Price last confirmed 29 days ago
Retailer 7
-
£1,967 GBP
View
Price last confirmed 25 days ago
Retailer 8
-
£2,043 GBP
View
Price last confirmed 36 days ago
B+
Retailer 9
-
£2,114 GBP
View
Retailer 10
-
£2,270 GBP
View
Price last confirmed 45 days ago
Retailer 11
-
£2,270 GBP
View
Price last confirmed 28 days ago
B
Retailer 12
-
£2,298 GBP
View
Retailer 13
-
£2,433 GBP
View
Price last confirmed 30 days ago
B
Retailer 14
-
£2,467 GBP
View
Retailer 15
-
£2,521 GBP
View
Price last confirmed 26 days ago
B
Retailer 16
-
£2,540 GBP
View
B
Retailer 17
-
£2,669 GBP
View
B
Retailer 18
-
£3,621 GBP
View
Retailer 19
-
£4,539 GBP
View
Price last confirmed 47 days ago
Most Expensive
NZ Jewellers
06c6b98c-7f62-42fb-8a70-5b8074bd83a6 · Oct 3
£4,539 GBP
$6,076 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from £1,656 GBPSave up to £1,966 GBP

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+
1.01ct Marquise
£1,656 GBP