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Oval|Lab Grown|IGI

0.99ct D SI1 Oval Lab Grown Diamond

VG • D/SI1 • IGI LG831639554

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG831639554

Diamond specifications and retailer prices

From $401 AUD
$282 USD
As of October 30, 2026
Save $581 AUD (59%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,163 AUD at MOH London · As of October 18, 2026
View at MOH London

About this 0.99ct lab-grown oval diamond

This 0.99ct lab-grown oval sits in the just-under-one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG831639554 or 831639554. Listed at 8 retailers as of October 30, 2026, with a 145% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.99
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.5°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831639554
Dimensions7.83 × 5.55 × 3.58 mm
L/W Ratio1.41
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
7.83 mm5.55 mm0.99 ctD / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG831639554
Side View
Table 61.0%Crown 33.5°Girdle: STK-THKPavilion 41.6°Culet: NoneDepth 64.5%

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: Oct 30
Current: $1,163 AUD|Low: $401 AUD|High: $1,224 AUD|Avg: $662 AUD|+0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 4$401 AUD
Retailer 3$423 AUD
Retailer 6$438 AUD
Retailer 7$461 AUD
Retailer 5$470 AUD
Retailer 8$702 AUD
Retailer 9$875 AUD
Retailer 2$982 AUD
MOH London$1,163 AUD

38 data points across 9 retailers

8 retailers$401 AUD to $982 AUD

A
Cheapest Retailer
-
$401 AUD
$282 USD
A
Retailer 2
-
$423 AUD
£234 GBP
View
B+
Retailer 3
-
$461 AUD
$324 USD
View
B+
Retailer 4
-
$470 AUD
£260 GBP
View
B+
Retailer 5
-
$702 AUD
$493 USD
View
B
Retailer 6
-
$875 AUD
$614 USD
View
B
Retailer 7
-
$982 AUD
$690 USD
View
Most Expensive
MOH London
LG831639554 · Oct 18
$1,163 AUD
£643 GBP
View
Price last confirmed 13 days ago
7 more retailers have this diamond
Prices start from $401 AUDSave up to $581 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
0.99ct Oval
$401 AUD