CaratHunter
Plans
Marquise|Natural|GIA

1.00ct F SI1 Marquise Natural Diamond

VG • F/SI1 • GIA 5566519907

Certificate GIA 5566519907

Diamond specifications and retailer prices

From £2,156 GBP
$2,893 USD
As of October 31, 2026
Save £1,944 GBP (47%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,100 GBP at Helzberg Diamonds · As of November 2, 2026
View at Helzberg Diamonds

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5566519907. Listed at 15 retailers as of October 31, 2026, with prices from £2,156 to £4,100, a £1,944 spread on the same certified stone. Helzberg Diamonds lists it at £4,100. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
F
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.57°
Pavilion angle36.53°
OriginNatural
Grading LabGIA
CertificateGIA 5566519907
Dimensions11.13 × 5.09 × 2.88 mm
L/W Ratio2.19
Culet sizeNone
Top View
11.13 mm5.09 mm1.00 ctF / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5566519907
Side View
Table 62.0%Crown 35.57°Girdle: STK-VTKPavilion 36.53°Culet: NDepth 56.6%

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: Oct 31
Current: £4,100 GBP|Low: £2,156 GBP|High: £4,100 GBP|Avg: £2,808 GBP
Helzberg Diamonds
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£2,156 GBP
Retailer 6£2,215 GBP
Retailer 14£2,324 GBP
Retailer 3£2,329 GBP
Retailer 9£2,370 GBP
Retailer 7£2,520 GBP
Retailer 5£2,597 GBP
Retailer 11£2,765 GBP
Retailer 4£2,823 GBP
Retailer 2£2,881 GBP
Retailer 8£2,990 GBP
Retailer 10£3,636 GBP
Retailer 12£3,869 GBP
Helzberg Diamonds£4,100 GBP

24 data points across 14 retailers

15 retailers£2,156 GBP to £4,100 GBP

A
Cheapest Retailer
-
£2,156 GBP
$2,893 USD
B+
Retailer 2
-
£2,196 GBP
SGD 3,983 SGD
View
B+
Retailer 3
-
£2,215 GBP
$2,973 USD
View
B+
Retailer 4
-
£2,324 GBP
$3,119 USD
View
B+
Retailer 5
-
£2,329 GBP
$3,126 USD
View
B+
Retailer 6
-
£2,370 GBP
$3,180 USD
View
B+
Retailer 7
-
£2,520 GBP
View
B+
Retailer 8
-
£2,597 GBP
SGD 4,710 SGD
View
B
Retailer 9
-
£2,765 GBP
$3,711 USD
View
B
Retailer 10
-
£2,823 GBP
$3,788 USD
View
B
Retailer 11
-
£2,881 GBP
€3,682 EUR
View
B
Retailer 12
-
£2,990 GBP
$4,013 USD
View
B
Retailer 13
-
£3,636 GBP
$4,879 USD
View
B
Retailer 14
-
£3,869 GBP
$5,192 USD
View
Most Expensive
B
Helzberg Diamonds
XZRLLMMLHPPGN · Nov 2
£4,100 GBP
$5,502 USD
View
14 more retailers have this diamond
Prices start from £2,156 GBPSave up to £1,944 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.

A
1.00ct Marquise
£2,156 GBP