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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG819628770

Shape and cutting style on the report: Round brilliant

Certificate IGI LG819628770

Diamond specifications and retailer prices

From $350 AUD
As of October 30, 2026
Save $1,236 AUD (78%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,755 AUD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG819628770 or 819628770. Listed at 17 retailers as of October 30, 2026, with a 353% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819628770
Dimensions7.35 × 7.31 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.35 mm7.31 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819628770
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
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 30
Current: $616 AUD|Low: $279 AUD|High: $1,755 AUD|Avg: $779 AUD|+4.6%
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
Reve Diamonds
October 31, 2026
Retailer 7$291 AUD
Retailer 15$350 AUD
Retailer 9$360 AUD
Retailer 17$394 AUD
Retailer 3$583 AUD
Retailer 1$616 AUD
Retailer 13$633 AUD
Retailer 2$644 AUD
Retailer 10$689 AUD
Retailer 8$769 AUD
Retailer 14$846 AUD
Retailer 12$987 AUD
Retailer 6$1,086 AUD
Retailer 11$1,201 AUD
Retailer 4$1,277 AUD
Retailer 16$1,586 AUD
Retailer 5$1,694 AUD
Reve Diamonds$1,755 AUD

32 data points across 18 retailers

17 retailers$350 AUD to $1,586 AUD

Retailer 1
-
$291 AUD
Price last confirmed 8 days ago
A
Retailer 2
-
$350 AUD
View
Retailer 3
-
$360 AUD
View
Price last confirmed 10 days ago
Retailer 4
-
$583 AUD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$616 AUD
View
A
Retailer 6
-
$633 AUD
View
B+
Retailer 7
-
$644 AUD
View
Price last confirmed 7 days ago
A
Retailer 8
-
$689 AUD
View
B+
Retailer 9
-
$769 AUD
View
B+
Retailer 10
-
$846 AUD
View
B+
Retailer 11
-
$987 AUD
View
Retailer 12
-
$1,086 AUD
View
Price last confirmed 12 days ago
B
Retailer 13
-
$1,201 AUD
View
B
Retailer 14
-
$1,277 AUD
View
B
Retailer 15
-
$1,586 AUD
View
Retailer 16
-
$1,694 AUD
View
Price last confirmed 8 days ago
Most Expensive
Reve Diamonds
563078C55 · Oct 30
$1,755 AUD
$1,229 USD
View
Price last confirmed 7 days ago
16 more retailers have this diamond
Prices start from $350 AUDSave up to $1,236 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
$350 AUD