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Radiant|Lab Grown|IGI

1.77ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG547276808

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

Certificate IGI LG547276808

Diamond specifications and retailer prices

From £140 GBP
$188 USD
As of October 27, 2026
Save £1,201 GBP (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,341 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.77ct lab-grown radiant diamond

This 1.77ct 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 top-tier cut grade and certified by IGI LG547276808 or 547276808. Listed at 10 retailers as of October 27, 2026, with prices from £140 to £1,341, a £1,201 spread on the same certified stone. Do Amore Diamonds lists it at £1,341. 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

1.77
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG547276808
Dimensions8.47 × 5.93 × 4.01 mm
L/W Ratio1.43
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
8.47 mm5.93 mm1.77 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG547276808
Side View
Table 63.5%Crown 42.9°Girdle: MediumPavilionCulet: NoneDepth 67.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: £1,341 GBP|Low: £139 GBP|High: £1,408 GBP|Avg: £583 GBP|-3.7%
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 12£140 GBP
Retailer 9£162 GBP
Retailer 15£162 GBP
Retailer 8£246 GBP
Retailer 14£304 GBP
Retailer 7£327 GBP
Retailer 6£411 GBP
Retailer 10£559 GBP
Retailer 4£606 GBP
Retailer 13£615 GBP
Retailer 3£620 GBP
Retailer 11£741 GBP
Retailer 2£771 GBP
Do Amore Diamonds£1,341 GBP
Retailer 5£1,408 GBP

24 data points across 15 retailers

10 retailers£140 GBP to £1,341 GBP

A
Cheapest Retailer
-
£140 GBP
$188 USD
A
Retailer 2
-
£162 GBP
$218 USD
View
A
Retailer 3
-
£162 GBP
$218 USD
View
Final sale: no returns
A
Retailer 4
-
£246 GBP
View
B+
Retailer 5
-
£304 GBP
$408 USD
View
Retailer 6
-
£559 GBP
$750 USD
View
Price last confirmed 7 days ago
B+
Retailer 7
-
£615 GBP
$825 USD
View
Retailer 8
-
£741 GBP
$995 USD
View
Price last confirmed 12 days ago
B+
Retailer 9
-
£771 GBP
View
Most Expensive
B
Do Amore Diamonds
27-8A74780A2 · Oct 29
£1,341 GBP
$1,800 USD
View
9 more retailers have this diamond
Prices start from £140 GBPSave up to £1,201 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
1.77ct Radiant
£140 GBP