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Asscher|Lab Grown|IGI

4.21ct D FL Asscher Lab Grown Diamond

EX • D/FL • IGI LG831604048

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG831604048

Diamond specifications and retailer prices

From $5,125 USD
£4,035 GBP
As of October 30, 2026
Save $18,146 USD (78%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $23,271 USD at With Clarity · As of October 30, 2026
View at With Clarity

About this 4.21ct lab-grown asscher diamond

This 4.21ct lab-grown asscher sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG831604048 or 831604048. Listed at 25 retailers as of October 30, 2026, with prices from $5,125 to $23,271, a $18,146 spread on the same certified stone. With Clarity lists it at $23,271. 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

4.21
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831604048
Dimensions8.97 × 8.94 × 5.92 mm
L/W Ratio1.00
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
8.97 mm8.94 mm4.21 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831604048
Side View
Table 62.0%Crown 35.3°Girdle: MediumPavilion 41.6°Culet: NoneDepth 66.2%

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: $14,200 USD|Low: $5,077 USD|High: $22,190 USD|Avg: $10,032 USD|-36.0%
Retailer 1
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
October 30, 2026
Retailer 8$5,125 USD
Retailer 6$5,289 USD
Retailer 5$5,542 USD
Retailer 7$6,135 USD
Retailer 3$6,757 USD
Retailer 13$7,347 USD
Retailer 9$7,862 USD
Retailer 4$8,970 USD
Retailer 15$9,172 USD
Retailer 11$10,080 USD
Retailer 12$12,550 USD
Retailer 10$13,057 USD
Retailer 1$14,200 USD
Retailer 2$14,737 USD
Retailer 14$21,247 USD

30 data points across 15 retailers

25 retailers$5,125 USD to $23,271 USD

A
Cheapest Retailer
-
$5,125 USD
£4,035 GBP
A
Retailer 2
-
$5,289 USD
View
A
Retailer 3
-
$5,542 USD
View
A
Retailer 4
-
$5,630 USD
View
A
Retailer 5
-
$5,922 USD
View
Final sale: no returns
A
Retailer 6
-
$6,135 USD
View
Retailer 7
-
$6,135 USD
View
Price last confirmed 14 days ago
A
Retailer 8
-
$6,150 USD
View
A
Retailer 9
-
$6,494 USD
View
A
Retailer 10
-
$6,757 USD
View
A
Retailer 11
-
$7,283 USD
View
A
Retailer 12
-
$7,347 USD
HK$57,400 HKD
View
A
Retailer 13
-
$7,862 USD
£6,191 GBP
View
B+
Retailer 14
-
$8,702 USD
£6,852 GBP
View
Retailer 15
-
$8,970 USD
View
Price last confirmed 11 days ago
B+
Retailer 16
-
$9,172 USD
View
B+
Retailer 17
-
$10,080 USD
€9,600 EUR
View
B+
Retailer 18
-
$12,550 USD
£9,882 GBP
View
B+
Retailer 19
-
$13,057 USD
ZAR 210,936 ZAR
View
B
Retailer 20
-
$14,200 USD
View
B
Retailer 21
-
$14,737 USD
View
B
Retailer 22
-
$17,060 USD
View
B
Retailer 23
-
$21,247 USD
SGD 28,712 SGD
View
B
Retailer 24
-
$21,860 USD
View
Most Expensive
B
With Clarity
831604048 · Oct 30
$23,271 USD
View
24 more retailers have this diamond
Prices start from $5,125 USDSave up to $18,146 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
4.21ct Asscher
$5,125 USD