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Round|Lab Grown|IGI

1.28ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG786633884

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786633884

Diamond specifications and retailer prices

From $260 USD
As of October 29, 2026
Save $2,220 USD (90%) vs most expensive(unlock to see where)
24 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 LG786633884 or 786633884. Listed at 24 retailers as of October 29, 2026, with prices from $260 to $2,480, a $2,220 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 angle35.3°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786633884
Dimensions6.91 × 6.95 × 4.31 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
6.91 mm6.95 mm1.28 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786633884
Side View
Table 58.0%Crown 35.3°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
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: $2,480 USD|Low: $290 USD|High: $2,480 USD|Avg: $773 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
October 30, 2026
Retailer 5$290 USD
Retailer 3$435 USD
Retailer 12$480 USD
Retailer 9$554 USD
Retailer 4$576 USD
Retailer 7$580 USD
Retailer 2$614 USD
Retailer 8$785 USD
Retailer 11$819 USD
Retailer 10$1,230 USD
Retailer 6$1,298 USD
Brilliant Earth$2,480 USD

41 data points across 12 retailers

24 retailers$260 USD to $2,480 USD

A
Cheapest Retailer
-
$260 USD
A
Retailer 2
-
$290 USD
View
Final sale: no returns
A
Retailer 3
-
$301 USD
View
A
Retailer 4
-
$322 USD
View
A
Retailer 5
-
$322 USD
View
A
Retailer 6
-
$358 USD
HK$2,800 HKD
View
A
Retailer 7
-
$435 USD
View
A
Retailer 8
-
$480 USD
View
A
Retailer 9
-
$554 USD
ZAR 8,945 ZAR
View
A
Retailer 10
-
$576 USD
View
A
Retailer 11
-
$580 USD
€552 EUR
View
A
Retailer 12
-
$614 USD
£484 GBP
View
A
Retailer 13
-
$726 USD
View
A
Retailer 14
-
$785 USD
A$1,207 AUD
View
B+
Retailer 15
-
$819 USD
View
B+
Retailer 16
-
$1,036 USD
View
B+
Retailer 17
-
$1,040 USD
SGD 1,406 SGD
View
B+
Retailer 18
-
$1,087 USD
View
B+
Retailer 19
-
$1,134 USD
View
Retailer 20
-
$1,230 USD
View
Price last confirmed 12 days ago
B+
Retailer 21
-
$1,298 USD
£1,022 GBP
View
B+
Retailer 22
-
$1,385 USD
View
B
Retailer 23
-
$2,286 USD
£1,800 GBP
View
Most Expensive
B
Brilliant Earth
18980939A · Oct 29
$2,480 USD
View
23 more retailers have this diamond
Prices start from $260 USDSave up to $2,220 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
$260 USD