CaratHunter
Plans
Round|Lab Grown|IGI

0.51ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG681525451

Shape and cutting style on the report: Round brilliant

Certificate IGI LG681525451

Diamond specifications and retailer prices

From $128 USD
As of October 29, 2026
Save $1,194 USD (90%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,322 USD at MOH London · As of October 27, 2026
View at MOH London

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG681525451 or 681525451. Listed at 20 retailers as of October 27, 2026, with prices from $128 to $1,322, a $1,194 spread on the same certified stone. MOH London lists it at $1,322. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG681525451
Dimensions5.16 × 5.20 × 3.14 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
5.16 mm5.20 mm0.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG681525451
Side View
Table 59.0%Crown 33.7°Girdle: MediumPavilion 41.1°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: $1,322 USD|Low: $122 USD|High: $1,328 USD|Avg: $374 USD|+0.9%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 30, 2026
Retailer 9$128 USD
Retailer 7$143 USD
Retailer 16$148 USD
Retailer 5$158 USD
Retailer 19$158 USD
Retailer 17$245 USD
Retailer 2$264 USD
Retailer 13$286 USD
Retailer 12$292 USD
Retailer 4$302 USD
Retailer 11$380 USD
Retailer 18$385 USD
Retailer 14$403 USD
Retailer 15$408 USD
Retailer 6$408 USD
Retailer 10$509 USD
Retailer 8$565 USD
Retailer 3$963 USD
MOH London$1,322 USD

39 data points across 19 retailers

20 retailers$128 USD to $1,322 USD

A
Cheapest Retailer
-
$128 USD
A
Retailer 2
-
$143 USD
View
Final sale: no returns
A
Retailer 3
-
$148 USD
View
A
Retailer 4
-
$158 USD
View
A
Retailer 5
-
$158 USD
View
A
Retailer 6
-
$245 USD
View
A
Retailer 7
-
$264 USD
£208 GBP
View
A
Retailer 8
-
$286 USD
ZAR 4,618 ZAR
View
A
Retailer 9
-
$292 USD
€278 EUR
View
A
Retailer 10
-
$302 USD
View
B+
Retailer 11
-
$380 USD
View
B+
Retailer 12
-
$385 USD
View
B+
Retailer 13
-
$403 USD
A$620 AUD
View
B+
Retailer 14
-
$408 USD
A$627 AUD
View
B+
Retailer 15
-
$408 USD
View
B+
Retailer 16
-
$509 USD
View
B+
Retailer 17
-
$511 USD
View
B
Retailer 18
-
$565 USD
View
B
Retailer 19
-
$963 USD
View
Most Expensive
B
MOH London
LG681525451 · Oct 26
$1,322 USD
£1,041 GBP
View
19 more retailers have this diamond
Prices start from $128 USDSave up to $1,194 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
0.51ct Round
$128 USD