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Round|Lab Grown|IGI

1.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG778644701

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778644701

Diamond specifications and retailer prices

From $458 AUD
$322 USD
As of November 1, 2026
Save $3,143 AUD (87%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $3,602 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 LG778644701 or 778644701. Listed at 24 retailers as of October 31, 2026, with prices from $458 to $3,602, a $3,143 spread on the same certified stone. Brilliant Earth lists it at $3,602. 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 angle34.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778644701
Dimensions7.33 × 7.35 × 4.57 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
7.33 mm7.35 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778644701
Side View
Table 56.0%Crown 34.8°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.3%

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: $3,602 AUD|Low: $458 AUD|High: $5,581 AUD|Avg: $1,390 AUD|-35.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
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Retailer 16
Retailer 17
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Retailer 21
Retailer 22
November 1, 2026
Retailer 7$458 AUD
Retailer 8$512 AUD
Retailer 22$532 AUD
Retailer 18$568 AUD
Retailer 14$572 AUD
Retailer 13$728 AUD
Retailer 12$790 AUD
Retailer 17$907 AUD
Retailer 3$922 AUD
Retailer 11$984 AUD
Retailer 16$1,013 AUD
Retailer 10$1,334 AUD
Retailer 5$1,371 AUD
Retailer 20$1,387 AUD
Retailer 9$1,821 AUD
Retailer 19$1,828 AUD
Retailer 6$1,892 AUD
Retailer 15$2,036 AUD
Retailer 4$2,254 AUD
Retailer 2$2,278 AUD
Retailer 21$2,412 AUD
Brilliant Earth$3,602 AUD

23 data points across 22 retailers

24 retailers$458 AUD to $3,602 AUD

A
Cheapest Retailer
-
$458 AUD
$322 USD
A
Retailer 2
-
$512 AUD
$360 USD
View
Final sale: no returns
A
Retailer 3
-
$532 AUD
$374 USD
View
A
Retailer 4
-
$568 AUD
$399 USD
View
Retailer 5
-
$572 AUD
$402 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$728 AUD
£403 GBP
View
A
Retailer 7
-
$790 AUD
$555 USD
View
A
Retailer 8
-
$907 AUD
€607 EUR
View
A
Retailer 9
-
$922 AUD
$648 USD
View
A
Retailer 10
-
$984 AUD
ZAR 11,164 ZAR
View
A
Retailer 11
-
$998 AUD
View
A
Retailer 12
-
$1,013 AUD
£560 GBP
View
A
Retailer 13
-
$1,334 AUD
View
B+
Retailer 14
-
$1,371 AUD
$963 USD
View
B+
Retailer 15
-
$1,387 AUD
$974 USD
View
B+
Retailer 16
-
$1,412 AUD
$992 USD
View
B+
Retailer 17
-
$1,821 AUD
SGD 1,729 SGD
View
B+
Retailer 18
-
$1,828 AUD
$1,284 USD
View
B+
Retailer 19
-
$1,892 AUD
$1,329 USD
View
B+
Retailer 20
-
$2,036 AUD
$1,430 USD
View
B+
Retailer 21
-
$2,254 AUD
$1,583 USD
View
B+
Retailer 22
-
$2,278 AUD
£1,260 GBP
View
B+
Retailer 23
-
$2,412 AUD
View
Most Expensive
B
Brilliant Earth
21000796A · Oct 31
$3,602 AUD
$2,530 USD
View
23 more retailers have this diamond
Prices start from $458 AUDSave up to $3,143 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
$458 AUD