Round|Lab Grown|IGI

1.28ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG713511172

Shape and cutting style on the report: Round brilliant

Certificate IGI LG713511172

Diamond specifications and retailer prices

From $195 USD
As of October 29, 2026
Save $634 USD (76%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,135 USD at MOH London · As of October 21, 2026
View at MOH London

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 LG713511172 or 713511172. Listed at 15 retailers as of October 29, 2026, with a 325% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle35.2°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG713511172
Dimensions6.95 × 6.99 × 4.27 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
6.95 mm6.99 mm1.28 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG713511172
Side View
Table 57.0%Crown 35.2°Girdle: MediumPavilion 40.4°Culet: NoneDepth 61.3%

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: $1,135 USD|Low: $187 USD|High: $1,142 USD|Avg: $487 USD|+0.6%
MOH London
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 30, 2026
Retailer 11$195 USD
Retailer 14$217 USD
Retailer 4$226 USD
Retailer 13$241 USD
Retailer 12$335 USD
Retailer 2$390 USD
Retailer 8$414 USD
Retailer 7$439 USD
Retailer 3$490 USD
Retailer 9$588 USD
Retailer 6$703 USD
Retailer 5$776 USD
Retailer 10$779 USD
MOH London$1,135 USD

40 data points across 14 retailers

15 retailers$195 USD to $829 USD

A
Cheapest Retailer
-
$195 USD
Retailer 2
-
$226 USD
View
Price last confirmed 9 days ago
Retailer 3
-
$241 USD
View
Price last confirmed 11 days ago
Retailer 4
-
$241 USD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$335 USD
View
A
Retailer 6
-
$390 USD
View
Retailer 7
-
$414 USD
View
Price last confirmed 9 days ago
A
Retailer 8
-
$439 USD
View
A
Retailer 9
-
$490 USD
View
Retailer 10
-
$588 USD
View
Price last confirmed 9 days ago
A
Retailer 11
-
$703 USD
View
Retailer 12
-
$776 USD
View
Price last confirmed 9 days ago
B+
Retailer 13
-
$779 USD
View
B+
Retailer 14
-
$829 USD
View
Most Expensive
MOH London
LG713511172 · Oct 21
$1,135 USD
£894 GBP
View
Price last confirmed 15 days ago
14 more retailers have this diamond
Prices start from $195 USDSave up to $634 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
$195 USD