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Round|Lab Grown|IGI

1.28ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG588375105

Shape and cutting style on the report: Round brilliant

Certificate IGI LG588375105

Diamond specifications and retailer prices

From $242 USD
As of October 29, 2026
Save $1,087 USD (82%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,329 USD at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

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 LG588375105 or 588375105. Listed at 18 retailers as of October 25, 2026, with prices from $242 to $1,329, a $1,087 spread on the same certified stone. Reve Diamonds lists it at $1,329. 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°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG588375105
Dimensions7.03 × 6.99 × 4.25 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
7.03 mm6.99 mm1.28 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG588375105
Side View
Table 59.0%Crown 34°Girdle: MediumPavilion 41°Culet: NoneDepth 60.6%

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: $242 USD|Low: $242 USD|High: $1,219 USD|Avg: $530 USD
Retailer 1
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
October 29, 2026
Retailer 1$242 USD
Retailer 6$270 USD
Retailer 13$281 USD
Retailer 10$301 USD
Retailer 14$301 USD
Retailer 8$488 USD
Retailer 4$506 USD
Retailer 2$508 USD
Retailer 5$542 USD
Retailer 9$565 USD
Retailer 11$738 USD
Retailer 12$966 USD
Retailer 3$970 USD
Retailer 7$1,212 USD

38 data points across 14 retailers

18 retailers$242 USD to $1,329 USD

A
Cheapest Retailer
-
$242 USD
A
Retailer 2
-
$270 USD
View
Final sale: no returns
A
Retailer 3
-
$281 USD
View
A
Retailer 4
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$301 USD
View
A
Retailer 5
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$301 USD
View
A
Retailer 6
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$488 USD
£384 GBP
View
A
Retailer 7
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$506 USD
View
A
Retailer 8
-
$508 USD
ZAR 8,211 ZAR
View
A
Retailer 9
-
$542 USD
View
A
Retailer 10
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$542 USD
View
A
Retailer 11
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$565 USD
£445 GBP
View
A
Retailer 12
-
$720 USD
View
A
Retailer 13
-
$738 USD
A$1,136 AUD
View
B+
Retailer 14
-
$966 USD
View
B+
Retailer 15
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$970 USD
View
B+
Retailer 16
-
$1,018 USD
View
B+
Retailer 17
-
$1,212 USD
£954 GBP
View
Most Expensive
B+
Reve Diamonds
E25E1660C · Oct 25
$1,329 USD
View
17 more retailers have this diamond
Prices start from $242 USDSave up to $1,087 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
$242 USD