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Round|Lab Grown|IGI

1.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG786646501

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786646501

Diamond specifications and retailer prices

From $601 AUD
$422 USD
As of November 1, 2026
Save $5,663 AUD (90%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $6,264 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG786646501 or 786646501. Listed at 24 retailers as of October 31, 2026, with prices from $601 to $6,264, a $5,663 spread on the same certified stone. Brilliant Earth lists it at $6,264. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786646501
Dimensions7.42 × 7.45 × 4.44 mm
L/W Ratio1.00
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
7.42 mm7.45 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786646501
Side View
Table 59.0%Crown 33.2°Girdle: MediumPavilion 40.6°Culet: NoneDepth 59.8%

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: Nov 1
Current: $6,264 AUD|Low: $577 AUD|High: $6,449 AUD|Avg: $1,754 AUD|-2.9%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 17$601 AUD
Retailer 12$672 AUD
Retailer 7$673 AUD
Retailer 3$746 AUD
Retailer 9$746 AUD
Retailer 14$954 AUD
Retailer 6$1,088 AUD
Retailer 10$1,167 AUD
Retailer 2$1,225 AUD
Retailer 13$1,281 AUD
Retailer 11$1,736 AUD
Retailer 16$1,798 AUD
Retailer 5$2,367 AUD
Retailer 8$2,396 AUD
Retailer 15$2,743 AUD
Retailer 4$2,790 AUD
Brilliant Earth$6,264 AUD

44 data points across 17 retailers

24 retailers$601 AUD to $6,264 AUD

A
Cheapest Retailer
-
$601 AUD
$422 USD
A
Retailer 2
-
$672 AUD
$472 USD
View
Final sale: no returns
A
Retailer 3
-
$673 AUD
$473 USD
View
Retailer 4
-
$746 AUD
$524 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$746 AUD
$524 USD
View
A
Retailer 6
-
$820 AUD
HK$4,500 HKD
View
A
Retailer 7
-
$954 AUD
$670 USD
View
A
Retailer 8
-
$999 AUD
$702 USD
View
A
Retailer 9
-
$1,088 AUD
$764 USD
View
A
Retailer 10
-
$1,167 AUD
€781 EUR
View
A
Retailer 11
-
$1,225 AUD
£678 GBP
View
A
Retailer 12
-
$1,281 AUD
ZAR 14,539 ZAR
View
A
Retailer 13
-
$1,419 AUD
$997 USD
View
B+
Retailer 14
-
$1,736 AUD
View
B+
Retailer 15
-
$1,798 AUD
$1,263 USD
View
B+
Retailer 16
-
$2,367 AUD
SGD 2,247 SGD
View
B+
Retailer 17
-
$2,396 AUD
$1,683 USD
View
B+
Retailer 18
-
$2,416 AUD
$1,697 USD
View
B+
Retailer 19
-
$2,444 AUD
$1,717 USD
View
B
Retailer 20
-
$2,709 AUD
$1,903 USD
View
B+
Retailer 21
-
$2,743 AUD
£1,517 GBP
View
B+
Retailer 22
-
$2,790 AUD
$1,960 USD
View
B
Retailer 23
-
$4,140 AUD
£2,290 GBP
View
Most Expensive
B
Brilliant Earth
21370785A · Oct 31
$6,264 AUD
$4,400 USD
View
23 more retailers have this diamond
Prices start from $601 AUDSave up to $5,663 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
1.51ct Round
$601 AUD