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Oval|Lab Grown|IGI

1.81ct D SI1 Oval Lab Grown Diamond

VG • D/SI1 • IGI LG512221639

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG512221639

Diamond specifications and retailer prices

From £311 GBP
$417 USD
As of October 30, 2026
Save £663 GBP (68%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £974 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.81ct lab-grown oval diamond

This 1.81ct 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 very-good cut grade and certified by IGI LG512221639 or 512221639. Listed at 12 retailers as of October 28, 2026, with prices from £311 to £974, a £663 spread on the same certified stone. Rare Carat lists it at £974. 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

1.81
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512221639
Dimensions9.52 × 6.80 × 4.30 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
9.52 mm6.80 mm1.81 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG512221639
Side View
Table 60.5%Crown 36.9°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 63.2%

Caratlytics Score

How it works →
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: £974 GBP|Low: £178 GBP|High: £1,052 GBP|Avg: £540 GBP|-7.5%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 6£178 GBP
Retailer 5£311 GBP
Retailer 2£324 GBP
Retailer 7£498 GBP
Retailer 4£573 GBP
Retailer 8£611 GBP
Retailer 9£611 GBP
Retailer 3£835 GBP
Rare Carat£974 GBP

40 data points across 9 retailers

12 retailers£311 GBP to £974 GBP

Retailer 1
-
£137 GBP
$184 USD
Price last confirmed 29 days ago
Retailer 2
-
£166 GBP
$223 USD
View
Price last confirmed 35 days ago
Retailer 3
-
£178 GBP
$238 USD
View
Price last confirmed 28 days ago
B+
Retailer 4
-
£311 GBP
$417 USD
View
A
Retailer 5
-
£324 GBP
View
B+
Retailer 6
-
£498 GBP
$667 USD
View
Retailer 7
-
£571 GBP
$765 USD
View
Price last confirmed 30 days ago
B
Retailer 8
-
£573 GBP
$768 USD
View
B
Retailer 9
-
£611 GBP
$819 USD
View
B
Retailer 10
-
£611 GBP
HK$6,400 HKD
View
B
Retailer 11
-
£835 GBP
View
Most Expensive
B
Rare Carat
512221639_l_512221639 · Oct 28
£974 GBP
$1,305 USD
View
11 more retailers have this diamond
Prices start from £311 GBPSave up to £663 GBP

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
1.81ct Oval
£311 GBP