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Radiant|Lab Grown|IGI

1.71ct F SI1 Radiant Lab Grown Diamond

GD • F/SI1 • IGI LG611390075

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG611390075

Diamond specifications and retailer prices

From £136 GBP
$182 USD
As of October 27, 2026
Save £1,170 GBP (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,306 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.71ct lab-grown radiant diamond

This 1.71ct lab-grown radiant sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG611390075 or 611390075. Listed at 10 retailers as of October 27, 2026, with prices from £136 to £1,306, a £1,170 spread on the same certified stone. Do Amore Diamonds lists it at £1,306. 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

1.71
Carat
F
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.4°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG611390075
Dimensions8.50 × 5.87 × 3.95 mm
L/W Ratio1.45
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.50 mm5.87 mm1.71 ctF / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG611390075
Side View
Table 64.0%Crown 43.4°Girdle: MED-STKPavilion 35.1°Culet: NoneDepth 67.3%

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 27
Current: £1,306 GBP|Low: £109 GBP|High: £1,358 GBP|Avg: £604 GBP|-3.8%
Do Amore 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
Retailer 15
October 29, 2026
Retailer 11£136 GBP
Retailer 8£157 GBP
Retailer 14£158 GBP
Retailer 10£298 GBP
Retailer 3£317 GBP
Retailer 4£404 GBP
Retailer 7£505 GBP
Retailer 9£572 GBP
Retailer 15£581 GBP
Retailer 12£598 GBP
Retailer 2£874 GBP
Retailer 6£895 GBP
Retailer 13£933 GBP
Retailer 5£1,060 GBP
Do Amore Diamonds£1,306 GBP

20 data points across 15 retailers

10 retailers£136 GBP to £1,306 GBP

A
Cheapest Retailer
-
£136 GBP
$182 USD
A
Retailer 2
-
£157 GBP
$211 USD
View
B+
Retailer 3
-
£158 GBP
$212 USD
View
Final sale: no returns
B+
Retailer 4
-
£298 GBP
$399 USD
View
B
Retailer 5
-
£572 GBP
$767 USD
View
Price last confirmed 7 days ago
B
Retailer 6
-
£598 GBP
$801 USD
View
B
Retailer 7
-
£874 GBP
View
B
Retailer 8
-
£933 GBP
$1,250 USD
View
B
Retailer 9
-
£1,060 GBP
$1,420 USD
View
Most Expensive
B
Do Amore Diamonds
27-45AE36F9B · Oct 29
£1,306 GBP
$1,750 USD
View
9 more retailers have this diamond
Prices start from £136 GBPSave up to £1,170 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
1.71ct Radiant
£136 GBP