Emerald|Lab Grown|IGI

3.18ct D IF Emerald Lab Grown Diamond

ID • D/IF • IGI LG680543138

Shape and cutting style on the report: Emerald cut

Certificate IGI LG680543138

Diamond specifications and retailer prices

From £1,109 GBP
$1,486 USD
As of October 30, 2026
Save £6,526 GBP (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £8,359 GBP at Brilliant Earth · As of October 18, 2026
View at Brilliant Earth

About this 3.18ct lab-grown emerald diamond

This 3.18ct lab-grown emerald sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG680543138 or 680543138. Listed at 16 retailers as of October 30, 2026, with a 588% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.18
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.5°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG680543138
Dimensions9.74 × 6.90 × 4.73 mm
L/W Ratio1.41
Culet sizeLarge
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
9.74 mm6.90 mm3.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG680543138
Side View
Table 64.0%Crown 41.5°Girdle: MED-STKPavilion 38.8°Culet: LargeDepth 68.6%

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: £8,359 GBP|Low: £1,065 GBP|High: £9,396 GBP|Avg: £3,032 GBP|-11.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 26, 2026
Retailer 12£1,109 GBP
Retailer 16£1,243 GBP
Retailer 13£1,287 GBP
Retailer 15£1,287 GBP
Retailer 11£1,321 GBP
Retailer 7£1,423 GBP
Retailer 6£1,475 GBP
Retailer 2£1,808 GBP
Retailer 17£1,873 GBP
Retailer 5£2,092 GBP
Retailer 3£2,335 GBP
Retailer 9£2,384 GBP
Retailer 14£3,468 GBP
Retailer 10£4,179 GBP
Retailer 8£4,995 GBP
Retailer 4£7,635 GBP
Brilliant Earth£8,359 GBP

17 data points across 17 retailers

16 retailers£1,109 GBP to £7,635 GBP

Retailer 1
-
£1,109 GBP
$1,486 USD
Price last confirmed 20 days ago
A
Retailer 2
-
£1,109 GBP
$1,486 USD
View
Retailer 3
-
£1,207 GBP
$1,617 USD
View
Price last confirmed 21 days ago
A
Retailer 4
-
£1,243 GBP
$1,665 USD
View
Final sale: no returns
Retailer 5
-
£1,287 GBP
$1,724 USD
View
Price last confirmed 28 days ago
Retailer 6
-
£1,287 GBP
$1,724 USD
View
Price last confirmed 18 days ago
Retailer 7
-
£1,287 GBP
$1,724 USD
View
Price last confirmed 9 days ago
Retailer 8
-
£1,287 GBP
$1,724 USD
View
Price last confirmed 19 days ago
A
Retailer 9
-
£1,321 GBP
$1,770 USD
View
A
Retailer 10
-
£1,808 GBP
$2,423 USD
View
A
Retailer 11
-
£1,873 GBP
$2,510 USD
View
A
Retailer 12
-
£2,335 GBP
$3,129 USD
View
B+
Retailer 13
-
£3,468 GBP
$4,647 USD
View
Retailer 14
-
£4,179 GBP
$5,600 USD
View
Price last confirmed 13 days ago
B
Retailer 15
-
£7,635 GBP
$10,230 USD
View
Most Expensive
Brilliant Earth
20194256Y · Oct 18
£8,359 GBP
$11,200 USD
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from £1,109 GBPSave up to £6,526 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
3.18ct Emerald
£1,109 GBP