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1.77ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG589389041

Shape and cutting style on the report: Round brilliant

Certificate IGI LG589389041

Diamond specifications and retailer prices

From £156 GBP
$209 USD
As of October 29, 2026
Save £1,344 GBP (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,500 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.77ct lab-grown round diamond

This 1.77ct lab-grown round 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 LG589389041 or 589389041. Listed at 10 retailers as of October 29, 2026, with prices from £156 to £1,500, a £1,344 spread on the same certified stone. Do Amore Diamonds lists it at £1,500. 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 angle34.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG589389041
Dimensions7.73 × 7.69 × 4.81 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.73 mm7.69 mm1.77 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG589389041
Side View
Table 56.0%Crown 34.9°Girdle: MediumPavilion 40.9°Culet: NoneDepth 62.3%

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 29
Current: £1,500 GBP|Low: £129 GBP|High: £1,537 GBP|Avg: £639 GBP|-2.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 8£156 GBP
Retailer 10£177 GBP
Retailer 6£181 GBP
Retailer 5£333 GBP
Retailer 7£586 GBP
Retailer 3£625 GBP
Retailer 4£687 GBP
Retailer 9£791 GBP
Retailer 2£862 GBP
Do Amore Diamonds£1,500 GBP

20 data points across 10 retailers

10 retailers£156 GBP to £1,500 GBP

A
Cheapest Retailer
-
£156 GBP
$209 USD
A
Retailer 2
-
£177 GBP
$237 USD
View
Final sale: no returns
A
Retailer 3
-
£181 GBP
$243 USD
View
B+
Retailer 4
-
£333 GBP
$446 USD
View
B+
Retailer 5
-
£586 GBP
$786 USD
View
Retailer 6
-
£625 GBP
$837 USD
View
Price last confirmed 7 days ago
B+
Retailer 7
-
£687 GBP
$921 USD
View
B
Retailer 8
-
£791 GBP
$1,060 USD
View
B
Retailer 9
-
£862 GBP
View
Most Expensive
B
Do Amore Diamonds
27-67326A655 · Oct 29
£1,500 GBP
$2,010 USD
View
9 more retailers have this diamond
Prices start from £156 GBPSave up to £1,344 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 Round
£156 GBP