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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 $436 NZD
As of October 30, 2026
Save $1,539 NZD (78%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,186 NZD 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

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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 30
Current: $767 NZD|Low: $347 NZD|High: $2,186 NZD|Avg: $970 NZD|+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$363 NZD
Retailer 15$436 NZD
Retailer 9$448 NZD
Retailer 17$491 NZD
Retailer 3$726 NZD
Retailer 1$767 NZD
Retailer 13$788 NZD
Retailer 2$802 NZD
Retailer 10$857 NZD
Retailer 8$957 NZD
Retailer 14$1,053 NZD
Retailer 12$1,229 NZD
Retailer 6$1,352 NZD
Retailer 11$1,496 NZD
Retailer 4$1,590 NZD
Retailer 16$1,975 NZD
Retailer 5$2,110 NZD
Reve Diamonds$2,186 NZD

32 data points across 18 retailers

17 retailers$436 NZD to $1,975 NZD

Retailer 1
-
$363 NZD
Price last confirmed 8 days ago
A
Retailer 2
-
$436 NZD
View
Retailer 3
-
$448 NZD
View
Price last confirmed 10 days ago
Retailer 4
-
$726 NZD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$767 NZD
View
A
Retailer 6
-
$788 NZD
View
B+
Retailer 7
-
$802 NZD
View
Price last confirmed 7 days ago
A
Retailer 8
-
$857 NZD
View
B+
Retailer 9
-
$957 NZD
View
B+
Retailer 10
-
$1,053 NZD
View
B+
Retailer 11
-
$1,229 NZD
View
Retailer 12
-
$1,352 NZD
View
Price last confirmed 12 days ago
B
Retailer 13
-
$1,496 NZD
View
B
Retailer 14
-
$1,590 NZD
View
B
Retailer 15
-
$1,975 NZD
View
Retailer 16
-
$2,110 NZD
View
Price last confirmed 8 days ago
Most Expensive
Reve Diamonds
563078C55 · Oct 30
$2,186 NZD
$1,229 USD
View
Price last confirmed 7 days ago
16 more retailers have this diamond
Prices start from $436 NZDSave up to $1,539 NZD

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
$436 NZD