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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 $4,872 AUD
$3,423 USD
As of October 29, 2026
Save $14,985 AUD (75%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $19,857 AUD 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 $4,872 to $19,857, a $14,985 spread on the same certified stone. Taylor and Hart lists it at $19,857. 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
Colour
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

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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: $7,515 AUD|Low: $4,226 AUD|High: $21,361 AUD|Avg: $9,197 AUD|-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$4,226 AUD
Retailer 9$4,872 AUD
Retailer 5$5,302 AUD
Retailer 7$5,456 AUD
Retailer 2$5,584 AUD
Retailer 8$5,652 AUD
Retailer 10$5,652 AUD
Retailer 18$7,063 AUD
Retailer 1$7,515 AUD
Retailer 17$7,797 AUD
Retailer 15$7,800 AUD
Retailer 13$8,187 AUD
Retailer 11$11,483 AUD
Retailer 4$11,495 AUD
Retailer 14$11,555 AUD
Retailer 6$14,170 AUD
Retailer 12$14,404 AUD
Retailer 3$15,686 AUD
Taylor and Hart$19,857 AUD

29 data points across 19 retailers

19 retailers$4,872 AUD to $19,857 AUD

Retailer 1
-
$4,226 AUD
£2,337 GBP
Price last confirmed 13 days ago
A
Retailer 2
-
$4,872 AUD
$3,423 USD
View
A
Retailer 3
-
$5,302 AUD
$3,725 USD
View
A
Retailer 4
-
$5,456 AUD
$3,833 USD
View
Final sale: no returns
A
Retailer 5
-
$5,584 AUD
$3,923 USD
View
A
Retailer 6
-
$5,652 AUD
$3,971 USD
View
Retailer 7
-
$5,652 AUD
$3,971 USD
View
Price last confirmed 17 days ago
A
Retailer 8
-
$7,063 AUD
$4,962 USD
View
A
Retailer 9
-
$7,515 AUD
£4,157 GBP
View
A
Retailer 10
-
$7,797 AUD
$5,478 USD
View
A
Retailer 11
-
$7,800 AUD
$5,480 USD
View
A
Retailer 12
-
$8,187 AUD
$5,752 USD
View
A
Retailer 13
-
$11,483 AUD
ZAR 130,324 ZAR
View
A
Retailer 14
-
$11,495 AUD
$8,076 USD
View
Retailer 15
-
$11,555 AUD
View
Price last confirmed 7 days ago
A
Retailer 16
-
$14,170 AUD
$9,955 USD
View
A
Retailer 17
-
$14,404 AUD
£7,968 GBP
View
A
Retailer 18
-
$15,686 AUD
$11,020 USD
View
Most Expensive
A
Taylor and Hart
L94QVO1 · Oct 30
$19,857 AUD
$13,950 USD
View
18 more retailers have this diamond
Prices start from $4,872 AUDSave up to $14,985 AUD

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
$4,872 AUD