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Radiant|Lab Grown|IGI

1.77ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG665410575

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

Certificate IGI LG665410575

Diamond specifications and retailer prices

From £249 GBP
$331 USD
As of October 27, 2026
Save £3,228 GBP (93%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: £3,477 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG665410575 or 665410575. Listed at 30 retailers as of October 27, 2026, with prices from £249 to £3,477, a £3,228 spread on the same certified stone. Brilliant Earth lists it at £3,477. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.77
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.7°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665410575
Dimensions6.16 × 6.16 × 3.99 mm
L/W Ratio1.00
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
6.16 mm6.16 mm1.77 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665410575
Side View
Table 61.0%Crown 40.7°Girdle: MediumPavilion 33.9°Culet: NoneDepth 64.8%

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: £3,477 GBP|Low: £249 GBP|High: £3,477 GBP|Avg: £928 GBP
Brilliant Earth
Retailer 2
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Retailer 22
October 29, 2026
Retailer 3£249 GBP
Retailer 19£279 GBP
Retailer 10£356 GBP
Retailer 18£424 GBP
Retailer 4£436 GBP
Retailer 21£501 GBP
Retailer 8£509 GBP
Retailer 17£530 GBP
Retailer 2£551 GBP
Retailer 9£702 GBP
Retailer 16£719 GBP
Retailer 22£905 GBP
Retailer 5£1,023 GBP
Retailer 12£1,025 GBP
Retailer 14£1,035 GBP
Retailer 15£1,036 GBP
Retailer 7£1,166 GBP
Retailer 6£1,211 GBP
Retailer 13£1,243 GBP
Retailer 11£1,294 GBP
Retailer 20£2,005 GBP
Brilliant Earth£3,477 GBP

34 data points across 22 retailers

30 retailers£249 GBP to £3,477 GBP

A
Cheapest Retailer
-
£249 GBP
$331 USD
Retailer 2
-
£249 GBP
$331 USD
View
Price last confirmed 21 days ago
Retailer 3
-
£259 GBP
$345 USD
View
Price last confirmed 29 days ago
A
Retailer 4
-
£279 GBP
$371 USD
View
Final sale: no returns
Retailer 5
-
£301 GBP
$401 USD
View
Price last confirmed 32 days ago
Retailer 6
-
£309 GBP
$411 USD
View
Price last confirmed 26 days ago
Retailer 7
-
£318 GBP
$423 USD
View
Price last confirmed 31 days ago
A
Retailer 8
-
£356 GBP
HK$3,700 HKD
View
A
Retailer 9
-
£424 GBP
$565 USD
View
A
Retailer 10
-
£436 GBP
$580 USD
View
A
Retailer 11
-
£501 GBP
€635 EUR
View
A
Retailer 12
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£509 GBP
$678 USD
View
A
Retailer 13
-
£530 GBP
ZAR 11,405 ZAR
View
A
Retailer 14
-
£551 GBP
View
A
Retailer 15
-
£702 GBP
$935 USD
View
A
Retailer 16
-
£719 GBP
A$1,473 AUD
View
A
Retailer 17
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£905 GBP
$1,205 USD
View
Retailer 18
-
£992 GBP
$1,321 USD
View
Price last confirmed 19 days ago
B+
Retailer 19
-
£992 GBP
$1,321 USD
View
B+
Retailer 20
-
£1,023 GBP
$1,362 USD
View
B+
Retailer 21
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£1,025 GBP
$1,365 USD
View
Retailer 22
-
£1,034 GBP
$1,377 USD
View
Price last confirmed 29 days ago
B+
Retailer 23
-
£1,035 GBP
SGD 1,862 SGD
View
B+
Retailer 24
-
£1,036 GBP
$1,380 USD
View
B+
Retailer 25
-
£1,166 GBP
$1,553 USD
View
B+
Retailer 26
-
£1,211 GBP
$1,613 USD
View
B+
Retailer 27
-
£1,243 GBP
View
Retailer 28
-
£1,294 GBP
A$2,651 AUD
View
Price last confirmed 27 days ago
Retailer 29
-
£2,005 GBP
$2,670 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
12598441A · Oct 29
£3,477 GBP
$4,630 USD
View
29 more retailers have this diamond
Prices start from £249 GBPSave up to £3,228 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
£249 GBP