CaratHunter
Plans
Round|Lab Grown|IGI

1.28ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG779630639

Shape and cutting style on the report: Round brilliant

Certificate IGI LG779630639

Diamond specifications and retailer prices

From $266 USD
As of October 29, 2026
Save $2,214 USD (89%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $2,480 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG779630639 or 779630639. Listed at 25 retailers as of October 29, 2026, with prices from $266 to $2,480, a $2,214 spread on the same certified stone. Brilliant Earth lists it at $2,480. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG779630639
Dimensions6.93 × 6.98 × 4.29 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
6.93 mm6.98 mm1.28 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG779630639
Side View
Table 59.0%Crown 34.9°Girdle: MediumPavilion 41.1°Culet: NoneDepth 61.8%

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 29
Current: $2,480 USD|Low: $257 USD|High: $2,480 USD|Avg: $807 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
Retailer 23
Retailer 24
October 30, 2026
Retailer 23$266 USD
Retailer 24$297 USD
Retailer 2$308 USD
Retailer 12$332 USD
Retailer 16$332 USD
Retailer 13$442 USD
Retailer 10$490 USD
Retailer 19$534 USD
Retailer 9$571 USD
Retailer 14$585 USD
Retailer 6$594 USD
Retailer 7$629 USD
Retailer 20$630 USD
Retailer 21$728 USD
Retailer 8$809 USD
Retailer 11$845 USD
Retailer 4$987 USD
Retailer 5$1,058 USD
Retailer 15$1,068 USD
Retailer 22$1,111 USD
Retailer 17$1,260 USD
Retailer 3$1,328 USD
Retailer 18$1,404 USD
Brilliant Earth$2,480 USD

28 data points across 24 retailers

25 retailers$266 USD to $2,480 USD

A
Cheapest Retailer
-
$266 USD
A
Retailer 2
-
$297 USD
View
Final sale: no returns
A
Retailer 3
-
$308 USD
View
A
Retailer 4
-
$332 USD
View
A
Retailer 5
-
$332 USD
View
A
Retailer 6
-
$371 USD
HK$2,900 HKD
View
A
Retailer 7
-
$442 USD
View
A
Retailer 8
-
$490 USD
View
A
Retailer 9
-
$534 USD
£420 GBP
View
A
Retailer 10
-
$571 USD
ZAR 9,225 ZAR
View
A
Retailer 11
-
$585 USD
View
A
Retailer 12
-
$594 USD
€566 EUR
View
A
Retailer 13
-
$629 USD
A$968 AUD
View
A
Retailer 14
-
$630 USD
£496 GBP
View
A
Retailer 15
-
$728 USD
View
A
Retailer 16
-
$809 USD
A$1,244 AUD
View
B+
Retailer 17
-
$845 USD
View
B+
Retailer 18
-
$987 USD
A$1,518 AUD
View
B+
Retailer 19
-
$1,058 USD
SGD 1,430 SGD
View
B+
Retailer 20
-
$1,068 USD
View
B+
Retailer 21
-
$1,111 USD
View
Retailer 22
-
$1,260 USD
View
Price last confirmed 22 days ago
B+
Retailer 23
-
$1,328 USD
£1,046 GBP
View
B+
Retailer 24
-
$1,404 USD
View
Most Expensive
B
Brilliant Earth
18530693A · Oct 29
$2,480 USD
View
24 more retailers have this diamond
Prices start from $266 USDSave up to $2,214 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
1.28ct Round
$266 USD