CaratHunter
Plans
Round|Lab Grown|IGI

5.12ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG728505108

Shape and cutting style on the report: Round brilliant

Certificate IGI LG728505108

Diamond specifications and retailer prices

From $3,423 USD
As of October 29, 2026
Save $10,527 USD (75%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $13,950 USD at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 5.12ct lab-grown round diamond

This 5.12ct lab-grown round sits in the over five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG728505108 or 728505108. Listed at 19 retailers as of October 29, 2026, with prices from $3,423 to $13,950, a $10,527 spread on the same certified stone. Taylor and Hart lists it at $13,950. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

5.12
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG728505108
Dimensions11.08 × 11.02 × 6.81 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
11.08 mm11.02 mm5.12 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG728505108
Side View
Table 59.0%Crown 34.9°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.7%

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: $5,279 USD|Low: $2,969 USD|High: $15,007 USD|Avg: $6,461 USD|-5.3%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Taylor and Hart
October 30, 2026
Retailer 16$2,969 USD
Retailer 9$3,423 USD
Retailer 5$3,725 USD
Retailer 7$3,833 USD
Retailer 2$3,923 USD
Retailer 8$3,971 USD
Retailer 10$3,971 USD
Retailer 18$4,962 USD
Retailer 1$5,279 USD
Retailer 17$5,478 USD
Retailer 15$5,480 USD
Retailer 13$5,752 USD
Retailer 11$8,067 USD
Retailer 4$8,076 USD
Retailer 14$8,118 USD
Retailer 6$9,955 USD
Retailer 12$10,119 USD
Retailer 3$11,020 USD
Taylor and Hart$13,950 USD

29 data points across 19 retailers

19 retailers$3,423 USD to $13,950 USD

Retailer 1
-
$2,969 USD
£2,337 GBP
Price last confirmed 13 days ago
A
Retailer 2
-
$3,423 USD
View
A
Retailer 3
-
$3,725 USD
View
A
Retailer 4
-
$3,833 USD
View
Final sale: no returns
A
Retailer 5
-
$3,923 USD
View
A
Retailer 6
-
$3,971 USD
View
Retailer 7
-
$3,971 USD
View
Price last confirmed 17 days ago
A
Retailer 8
-
$4,962 USD
View
A
Retailer 9
-
$5,279 USD
£4,157 GBP
View
A
Retailer 10
-
$5,478 USD
View
A
Retailer 11
-
$5,480 USD
View
A
Retailer 12
-
$5,752 USD
View
A
Retailer 13
-
$8,067 USD
ZAR 130,324 ZAR
View
A
Retailer 14
-
$8,076 USD
View
Retailer 15
-
$8,118 USD
A$12,489 AUD
View
Price last confirmed 7 days ago
A
Retailer 16
-
$9,955 USD
View
A
Retailer 17
-
$10,119 USD
£7,968 GBP
View
A
Retailer 18
-
$11,020 USD
View
Most Expensive
A
Taylor and Hart
L94QVO1 · Oct 30
$13,950 USD
View
18 more retailers have this diamond
Prices start from $3,423 USDSave up to $10,527 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
5.12ct Round
$3,423 USD