CaratHunter
Plans
Round|Lab Grown|IGI

1.28ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG668433294

Shape and cutting style on the report: Round brilliant

Certificate IGI LG668433294

Diamond specifications and retailer prices

From $237 USD
As of November 1, 2026
Save $1,393 USD (85%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $1,630 USD at Brilliant Earth · As of October 31, 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 F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG668433294 or 668433294. Listed at 21 retailers as of October 31, 2026, with prices from $237 to $1,630, a $1,393 spread on the same certified stone. Brilliant Earth lists it at $1,630. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
F
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG668433294
Dimensions6.94 × 6.98 × 4.32 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
6.94 mm6.98 mm1.28 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG668433294
Side View
Table 57.0%Crown 35.4°Girdle: MediumPavilion 41.1°Culet: NoneDepth 62.1%

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: Nov 1
Current: $1,630 USD|Low: $227 USD|High: $1,910 USD|Avg: $650 USD|-14.7%
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
November 2, 2026
Retailer 12$237 USD
Retailer 5$265 USD
Retailer 3$294 USD
Retailer 13$395 USD
Retailer 8$507 USD
Retailer 6$532 USD
Retailer 4$536 USD
Retailer 7$549 USD
Retailer 10$716 USD
Retailer 2$781 USD
Retailer 11$1,170 USD
Retailer 9$1,176 USD
Brilliant Earth$1,630 USD

43 data points across 13 retailers

21 retailers$237 USD to $1,630 USD

A
Cheapest Retailer
-
$237 USD
A
Retailer 2
-
$265 USD
View
Final sale: no returns
A
Retailer 3
-
$275 USD
View
Retailer 4
-
$294 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$294 USD
View
A
Retailer 6
-
$333 USD
HK$2,600 HKD
View
A
Retailer 7
-
$395 USD
View
A
Retailer 8
-
$507 USD
ZAR 8,187 ZAR
View
A
Retailer 9
-
$532 USD
€507 EUR
View
A
Retailer 10
-
$536 USD
View
A
Retailer 11
-
$549 USD
£432 GBP
View
B+
Retailer 12
-
$701 USD
View
B+
Retailer 13
-
$716 USD
A$1,101 AUD
View
B+
Retailer 14
-
$781 USD
View
B+
Retailer 15
-
$944 USD
View
B+
Retailer 16
-
$948 USD
SGD 1,281 SGD
View
B+
Retailer 17
-
$996 USD
View
B
Retailer 18
-
$1,020 USD
View
B
Retailer 19
-
$1,170 USD
View
B+
Retailer 20
-
$1,176 USD
£926 GBP
View
Most Expensive
B
Brilliant Earth
14522387A · Oct 31
$1,630 USD
View
20 more retailers have this diamond
Prices start from $237 USDSave up to $1,393 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
$237 USD