Marquise|Natural|GIA

1.00ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 1549818428

Certificate GIA 1549818428

Diamond specifications and retailer prices

From £2,541 GBP
$3,410 USD
As of November 1, 2026
Save £2,791 GBP (52%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £5,555 GBP at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded G 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 1549818428. Listed at 17 retailers as of November 1, 2026, with a 110% 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1549818428
Dimensions10.01 × 5.23 × 3.24 mm
L/W Ratio1.91
Key to symbols
Feather, Cloud, Crystal, Indented Natural, Natural
Top View
10.01 mm5.23 mm1.00 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1549818428
Side View
Table 58.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 61.9%

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 1
Current: £3,110 GBP|Low: £2,541 GBP|High: £5,396 GBP|Avg: £3,393 GBP|-0.6%
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
November 2, 2026
Retailer 13£2,541 GBP
Retailer 12£2,713 GBP
Retailer 11£2,761 GBP
Retailer 5£2,888 GBP
Retailer 1£3,110 GBP
Retailer 8£3,262 GBP
Retailer 3£3,264 GBP
Retailer 4£3,264 GBP
Retailer 2£3,368 GBP
Retailer 14£3,422 GBP
Retailer 7£3,607 GBP
Retailer 6£3,607 GBP
Retailer 10£3,919 GBP
Retailer 9£5,332 GBP

20 data points across 14 retailers

17 retailers£2,541 GBP to £5,332 GBP

B+
Cheapest Retailer
-
£2,541 GBP
$3,410 USD
B+
Retailer 2
-
£2,713 GBP
$3,641 USD
View
B+
Retailer 3
-
£2,761 GBP
$3,705 USD
View
Retailer 4
-
£2,888 GBP
$3,876 USD
View
Price last confirmed 32 days ago
Retailer 5
-
£2,999 GBP
$4,025 USD
View
Price last confirmed 32 days ago
B+
Retailer 6
-
£3,110 GBP
View
B+
Retailer 7
-
£3,262 GBP
View
B
Retailer 8
-
£3,264 GBP
$4,380 USD
View
B
Retailer 9
-
£3,264 GBP
$4,380 USD
View
Retailer 10
-
£3,333 GBP
$4,473 USD
View
Price last confirmed 34 days ago
B
Retailer 11
-
£3,368 GBP
$4,520 USD
View
Retailer 12
-
£3,422 GBP
A$7,065 AUD
View
Price last confirmed 30 days ago
B
Retailer 13
-
£3,607 GBP
€4,610 EUR
View
Retailer 14
-
£3,607 GBP
$4,841 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
£3,919 GBP
ZAR 84,964 ZAR
View
B
Retailer 16
-
£5,332 GBP
View
Most Expensive
NZ Jewellers
814ae926-9ab3-4cd7-8ec7-86528d4e2e8f · Sep 29
£5,555 GBP
$7,454 USD
View
Price last confirmed 34 days ago
16 more retailers have this diamond
Prices start from £2,541 GBPSave up to £2,791 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+
1.00ct Marquise
£2,541 GBP