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0.51ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG770644375

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770644375

Diamond specifications and retailer prices

From $154 NZD
$87 USD
As of November 1, 2026
Save $1,325 NZD (90%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,480 NZD at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG770644375 or 770644375. Listed at 15 retailers as of November 1, 2026, with prices from $154 to $1,480, a $1,325 spread on the same certified stone. Reve Diamonds lists it at $1,480. 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

0.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770644375
Dimensions5.14 × 5.12 × 3.16 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
5.14 mm5.12 mm0.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770644375
Side View
Table 58.0%Crown 34.8°Girdle: MediumPavilion 41°Culet: NoneDepth 61.5%

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: $154 NZD|Low: $154 NZD|High: $1,510 NZD|Avg: $498 NZD|-5.4%
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
Reve Diamonds
November 1, 2026
Retailer 1$154 NZD
Retailer 13$172 NZD
Retailer 3$179 NZD
Retailer 12$204 NZD
Retailer 5$216 NZD
Retailer 7$284 NZD
Retailer 9$351 NZD
Retailer 2$410 NZD
Retailer 4$425 NZD
Retailer 6$472 NZD
Retailer 10$605 NZD
Retailer 14$617 NZD
Retailer 11$723 NZD
Retailer 8$1,411 NZD
Reve Diamonds$1,480 NZD

43 data points across 15 retailers

15 retailers$154 NZD to $1,480 NZD

A
Cheapest Retailer
-
$154 NZD
$87 USD
A
Retailer 2
-
$172 NZD
$97 USD
View
Final sale: no returns
A
Retailer 3
-
$179 NZD
$101 USD
View
A
Retailer 4
-
$204 NZD
$115 USD
View
Retailer 5
-
$216 NZD
$122 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$284 NZD
$160 USD
View
A
Retailer 7
-
$351 NZD
£156 GBP
View
A
Retailer 8
-
$410 NZD
$231 USD
View
B+
Retailer 9
-
$425 NZD
€228 EUR
View
B+
Retailer 10
-
$472 NZD
$266 USD
View
B+
Retailer 11
-
$605 NZD
$341 USD
View
B+
Retailer 12
-
$617 NZD
$348 USD
View
B+
Retailer 13
-
$723 NZD
$407 USD
View
B
Retailer 14
-
$1,411 NZD
£626 GBP
View
Most Expensive
B
Reve Diamonds
3D3DEC431 · Nov 1
$1,480 NZD
$834 USD
View
14 more retailers have this diamond
Prices start from $154 NZDSave up to $1,325 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
0.51ct Round
$154 NZD