CaratHunter
Plans
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 $331 USD
As of October 27, 2026
Save $4,299 USD (93%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: $4,630 USD 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 $331 to $4,630, a $4,299 spread on the same certified stone. Brilliant Earth lists it at $4,630. 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
Color
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

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: $4,630 USD|Low: $331 USD|High: $4,630 USD|Avg: $1,236 USD
Brilliant Earth
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
October 29, 2026
Retailer 3$331 USD
Retailer 19$371 USD
Retailer 10$474 USD
Retailer 18$565 USD
Retailer 4$580 USD
Retailer 21$667 USD
Retailer 8$678 USD
Retailer 17$706 USD
Retailer 2$733 USD
Retailer 9$935 USD
Retailer 16$957 USD
Retailer 22$1,205 USD
Retailer 5$1,362 USD
Retailer 12$1,365 USD
Retailer 14$1,378 USD
Retailer 15$1,380 USD
Retailer 7$1,553 USD
Retailer 6$1,613 USD
Retailer 13$1,655 USD
Retailer 11$1,723 USD
Retailer 20$2,670 USD
Brilliant Earth$4,630 USD

34 data points across 22 retailers

30 retailers$331 USD to $4,630 USD

A
Cheapest Retailer
-
$331 USD
A
Retailer 2
-
$331 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
$345 USD
View
Price last confirmed 29 days ago
A
Retailer 4
-
$371 USD
View
Final sale: no returns
A
Retailer 5
-
$401 USD
View
Price last confirmed 32 days ago
A
Retailer 6
-
$411 USD
View
Price last confirmed 26 days ago
A
Retailer 7
-
$423 USD
View
Price last confirmed 30 days ago
A
Retailer 8
-
$474 USD
HK$3,700 HKD
View
A
Retailer 9
-
$565 USD
View
A
Retailer 10
-
$580 USD
View
A
Retailer 11
-
$667 USD
€635 EUR
View
A
Retailer 12
-
$678 USD
View
A
Retailer 13
-
$706 USD
ZAR 11,405 ZAR
View
A
Retailer 14
-
$733 USD
£577 GBP
View
A
Retailer 15
-
$935 USD
View
A
Retailer 16
-
$957 USD
A$1,473 AUD
View
A
Retailer 17
-
$1,205 USD
View
B+
Retailer 18
-
$1,321 USD
View
Price last confirmed 19 days ago
B+
Retailer 19
-
$1,321 USD
View
B+
Retailer 20
-
$1,362 USD
View
B+
Retailer 21
-
$1,365 USD
View
B+
Retailer 22
-
$1,377 USD
View
Price last confirmed 29 days ago
B+
Retailer 23
-
$1,378 USD
SGD 1,862 SGD
View
B+
Retailer 24
-
$1,380 USD
View
B+
Retailer 25
-
$1,553 USD
View
B+
Retailer 26
-
$1,613 USD
View
B+
Retailer 27
-
$1,655 USD
£1,303 GBP
View
B+
Retailer 28
-
$1,723 USD
A$2,651 AUD
View
Price last confirmed 27 days ago
B+
Retailer 29
-
$2,670 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
12598441A · Oct 29
$4,630 USD
View
29 more retailers have this diamond
Prices start from $331 USDSave up to $4,299 USD

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
$331 USD