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Oval|Lab Grown|IGI

1.83ct D SI1 Oval Lab Grown Diamond

GD • D/SI1 • IGI LG512222817

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG512222817

Diamond specifications and retailer prices

From $743 NZD
$419 USD
As of October 30, 2026
Save $1,599 NZD (68%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,508 NZD at Rare Carat · As of September 6, 2026
View at Rare Carat

About this 1.83ct lab-grown oval diamond

This 1.83ct lab-grown oval sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG512222817 or 512222817. Listed at 13 retailers as of October 28, 2026, with a 215% 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

1.83
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.4°
Pavilion angle42.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512222817
Dimensions9.77 × 6.98 × 4.39 mm
L/W Ratio1.40
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
9.77 mm6.98 mm1.83 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512222817
Side View
Table 59.5%Crown 32.4°Girdle: MED-STKPavilion 42.3°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $2,342 NZD|Low: $426 NZD|High: $2,508 NZD|Avg: $1,301 NZD|-6.6%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 6$426 NZD
Retailer 5$743 NZD
Retailer 2$778 NZD
Retailer 7$1,210 NZD
Retailer 4$1,375 NZD
Retailer 8$1,466 NZD
Retailer 9$1,476 NZD
Retailer 3$2,003 NZD
Rare Carat$2,342 NZD

40 data points across 9 retailers

13 retailers$743 NZD to $2,342 NZD

Retailer 1
-
$330 NZD
$186 USD
Price last confirmed 29 days ago
Retailer 2
-
$399 NZD
$225 USD
View
Price last confirmed 35 days ago
Retailer 3
-
$426 NZD
$240 USD
View
Price last confirmed 29 days ago
B
Retailer 4
-
$743 NZD
$419 USD
View
B+
Retailer 5
-
$778 NZD
£345 GBP
View
B+
Retailer 6
-
$1,210 NZD
$682 USD
View
Retailer 7
-
$1,372 NZD
$773 USD
View
Price last confirmed 31 days ago
B
Retailer 8
-
$1,375 NZD
$775 USD
View
B
Retailer 9
-
$1,466 NZD
$826 USD
View
B
Retailer 10
-
$1,476 NZD
HK$6,500 HKD
View
B
Retailer 11
-
$2,003 NZD
£889 GBP
View
B
Retailer 12
-
$2,342 NZD
$1,320 USD
View
Most Expensive
Rare Carat
KD0770 · Sep 6
$2,508 NZD
$1,414 USD
View
Price last confirmed 55 days ago
12 more retailers have this diamond
Prices start from $743 NZDSave up to $1,599 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.

B+
1.83ct Oval
$743 NZD