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Round|Lab Grown|IGI

1.55ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG678536607

Shape and cutting style on the report: Round brilliant

Certificate IGI LG678536607

Diamond specifications and retailer prices

From $330 USD
As of October 29, 2026
Save $2,520 USD (88%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $2,850 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round 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 LG678536607 or 678536607. Listed at 28 retailers as of October 29, 2026, with prices from $330 to $2,850, a $2,520 spread on the same certified stone. Brilliant Earth lists it at $2,850. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678536607
Dimensions7.38 × 7.43 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.38 mm7.43 mm1.55 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678536607
Side View
Table 57.0%Crown 35.1°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.6%

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 29
Current: $2,850 USD|Low: $314 USD|High: $2,850 USD|Avg: $1,016 USD
Brilliant Earth
Retailer 2
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Retailer 22
October 29, 2026
Retailer 8$330 USD
Retailer 20$383 USD
Retailer 13$393 USD
Retailer 3$410 USD
Retailer 4$410 USD
Retailer 16$619 USD
Retailer 11$655 USD
Retailer 5$662 USD
Retailer 22$668 USD
Retailer 17$684 USD
Retailer 15$701 USD
Retailer 18$704 USD
Retailer 2$729 USD
Retailer 7$1,063 USD
Retailer 9$1,317 USD
Retailer 10$1,361 USD
Retailer 12$1,444 USD
Retailer 14$1,509 USD
Retailer 6$1,610 USD
Retailer 19$1,645 USD
Retailer 21$2,135 USD
Brilliant Earth$2,850 USD

29 data points across 22 retailers

28 retailers$330 USD to $2,850 USD

Retailer 1
-
$328 USD
Price last confirmed 38 days ago
A
Retailer 2
-
$330 USD
View
A
Retailer 3
-
$383 USD
View
A
Retailer 4
-
$393 USD
View
Final sale: no returns
Retailer 5
-
$401 USD
View
Price last confirmed 38 days ago
A
Retailer 6
-
$410 USD
View
A
Retailer 7
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$410 USD
View
A
Retailer 8
-
$619 USD
£488 GBP
View
A
Retailer 9
-
$655 USD
View
A
Retailer 10
-
$662 USD
View
A
Retailer 11
-
$668 USD
View
A
Retailer 12
-
$684 USD
€651 EUR
View
A
Retailer 13
-
$701 USD
A$1,078 AUD
View
A
Retailer 14
-
$704 USD
ZAR 11,376 ZAR
View
A
Retailer 15
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$729 USD
£574 GBP
View
A
Retailer 16
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$923 USD
View
B+
Retailer 17
-
$1,063 USD
View
Retailer 18
-
$1,305 USD
View
Price last confirmed 38 days ago
B+
Retailer 19
-
$1,317 USD
View
B+
Retailer 20
-
$1,361 USD
View
B+
Retailer 21
-
$1,366 USD
View
Retailer 22
-
$1,444 USD
A$2,222 AUD
View
Price last confirmed 21 days ago
B+
Retailer 23
-
$1,509 USD
View
B+
Retailer 24
-
$1,535 USD
View
B+
Retailer 25
-
$1,610 USD
View
B+
Retailer 26
-
$1,645 USD
£1,295 GBP
View
Retailer 27
-
$2,135 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
14529369A · Oct 29
$2,850 USD
View
27 more retailers have this diamond
Prices start from $330 USDSave up to $2,520 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
1.55ct Round
$330 USD