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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 $282 USD
As of October 29, 2026
Save $578 USD (67%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $860 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 29, 2026, with prices from $282 to $860, a $578 spread on the same certified stone. Brilliant Earth lists it at $860. 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
Color
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 29
Current: $860 USD|Low: $282 USD|High: $860 USD|Avg: $466 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 3$282 USD
Retailer 2$297 USD
Retailer 5$308 USD
Retailer 7$324 USD
Retailer 4$330 USD
Retailer 8$493 USD
Retailer 9$614 USD
Retailer 6$817 USD
Brilliant Earth$860 USD

38 data points across 9 retailers

8 retailers$282 USD to $860 USD

A
Cheapest Retailer
-
$282 USD
A
Retailer 2
-
$297 USD
£234 GBP
View
A
Retailer 3
-
$324 USD
View
B+
Retailer 4
-
$330 USD
£260 GBP
View
B+
Retailer 5
-
$493 USD
View
B
Retailer 6
-
$614 USD
View
Retailer 7
-
$817 USD
£643 GBP
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
21321561A · Oct 29
$860 USD
View
7 more retailers have this diamond
Prices start from $282 USDSave up to $578 USD

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
$282 USD