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Round|Lab Grown|IGI

1.00ct F SI2 Round Lab Grown Diamond

GD • F/SI2 • IGI LG472171918

Shape and cutting style on the report: Round brilliant

Certificate IGI LG472171918

Diamond specifications and retailer prices

From £396 GBP
$530 USD
As of October 31, 2026
Save £473 GBP (54%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,465 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by IGI LG472171918 or 472171918. Listed at 11 retailers as of October 31, 2026, with a 120% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.4°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG472171918
Dimensions6.33 × 6.26 × 3.90 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.33 mm6.26 mm1.00 ctF / SI2
OriginLab Grown
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG472171918
Side View
Table 54.0%Crown 32.4°Girdle: THK-VTKPavilion 39.6°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £869 GBP|Low: £358 GBP|High: £2,447 GBP|Avg: £826 GBP|+4.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 4£396 GBP
Retailer 7£449 GBP
Retailer 10£502 GBP
Retailer 2£503 GBP
Retailer 8£557 GBP
Retailer 11£557 GBP
Retailer 3£808 GBP
Retailer 9£854 GBP
Retailer 1£869 GBP
Retailer 6£1,382 GBP
Retailer 5£2,421 GBP

41 data points across 11 retailers

11 retailers£396 GBP to £869 GBP

B
Cheapest Retailer
-
£396 GBP
$530 USD
B
Retailer 2
-
£449 GBP
$602 USD
View
B
Retailer 3
-
£502 GBP
$673 USD
View
Final sale: no returns
B
Retailer 4
-
£503 GBP
$674 USD
View
B
Retailer 5
-
£557 GBP
$746 USD
View
Retailer 6
-
£557 GBP
$746 USD
View
Price last confirmed 16 days ago
C
Retailer 7
-
£854 GBP
$1,144 USD
View
C
Retailer 8
-
£869 GBP
View
Retailer 9
-
£1,382 GBP
$1,852 USD
View
Price under review
Most Expensive
NZ Jewellers
cfd2a81a-7dcf-4802-9a29-a8d7c87d9842 · Oct 30
£1,465 GBP
$1,963 USD
View
Price under review
9 more retailers have this diamond
Prices start from £396 GBPSave up to £473 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 Round
£396 GBP