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0.31ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG677530369

Shape and cutting style on the report: Round brilliant

Certificate IGI LG677530369

Diamond specifications and retailer prices

From $135 NZD
$76 USD
As of October 29, 2026
Save $1,105 NZD (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,239 NZD at MOH London · As of October 29, 2026
View at MOH London

About this 0.31ct lab-grown round diamond

This 0.31ct lab-grown round sits in the sub-half-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG677530369 or 677530369. Listed at 17 retailers as of October 29, 2026, with prices from $135 to $1,239, a $1,105 spread on the same certified stone. MOH London lists it at $1,239. 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

0.31
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677530369
Dimensions4.36 × 4.34 × 2.62 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
4.36 mm4.34 mm0.31 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677530369
Side View
Table 61.0%Crown 34.6°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.3%

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: Oct 29
Current: $1,239 NZD|Low: $106 NZD|High: $1,239 NZD|Avg: $408 NZD|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 13$135 NZD
Retailer 5$151 NZD
Retailer 7$156 NZD
Retailer 9$179 NZD
Retailer 10$179 NZD
Retailer 6$316 NZD
Retailer 2$361 NZD
Retailer 4$374 NZD
Retailer 3$390 NZD
Retailer 12$539 NZD
Retailer 8$570 NZD
Retailer 11$646 NZD
MOH London$1,239 NZD

41 data points across 13 retailers

17 retailers$135 NZD to $1,239 NZD

A
Cheapest Retailer
-
$135 NZD
$76 USD
Retailer 2
-
$135 NZD
$76 USD
View
Price last confirmed 40 days ago
A
Retailer 3
-
$151 NZD
$85 USD
View
Final sale: no returns
Retailer 4
-
$156 NZD
$88 USD
View
Price last confirmed 42 days ago
A
Retailer 5
-
$156 NZD
$88 USD
View
Retailer 6
-
$176 NZD
$99 USD
View
Price last confirmed 40 days ago
A
Retailer 7
-
$179 NZD
$101 USD
View
A
Retailer 8
-
$179 NZD
$101 USD
View
A
Retailer 9
-
$316 NZD
£140 GBP
View
B+
Retailer 10
-
$361 NZD
€194 EUR
View
B+
Retailer 11
-
$374 NZD
$211 USD
View
Retailer 12
-
$390 NZD
$220 USD
View
Price last confirmed 19 days ago
Retailer 13
-
$536 NZD
$302 USD
View
Price last confirmed 41 days ago
B+
Retailer 14
-
$539 NZD
$304 USD
View
B
Retailer 15
-
$570 NZD
$321 USD
View
B
Retailer 16
-
$646 NZD
$364 USD
View
Most Expensive
B
MOH London
LG677530369 · Oct 29
$1,239 NZD
£550 GBP
View
16 more retailers have this diamond
Prices start from $135 NZDSave up to $1,105 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
0.31ct Round
$135 NZD