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Marquise|Lab Grown|IGI

4.26ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG754595411

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG754595411

Diamond specifications and retailer prices

From $16,639 USD
As of November 1, 2026
Save $25,375 USD (60%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $42,014 USD at Cape Diamonds · As of October 29, 2026
View at Cape Diamonds

About this 4.26ct lab-grown marquise diamond

This 4.26ct lab-grown marquise 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 LG754595411 or 754595411. Listed at 29 retailers as of October 29, 2026, with prices from $16,639 to $42,014, a $25,375 spread on the same certified stone. Cape Diamonds lists it at $42,014. 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

4.26
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754595411
Dimensions16.53 × 8.39 × 5.37 mm
L/W Ratio1.97
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
16.53 mm8.39 mm4.26 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754595411
Side View
Table 60.0%Crown 36.5°Girdle: MED-THKPavilion 40.7°Culet: NoneDepth 64.0%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $42,014 USD|Low: $13,611 USD|High: $73,572 USD|Avg: $31,327 USD|+1.9%
Cape Diamonds
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
November 1, 2026
Retailer 5$16,639 USD
Retailer 17$17,015 USD
Retailer 8$17,941 USD
Retailer 9$18,071 USD
Retailer 12$19,057 USD
Retailer 16$19,728 USD
Retailer 15$21,590 USD
Retailer 13$21,728 USD
Retailer 6$28,270 USD
Retailer 10$31,003 USD
Retailer 14$33,614 USD
Retailer 11$34,191 USD
Retailer 3$35,666 USD
Cape Diamonds$42,014 USD
Retailer 2$42,804 USD
Retailer 7$55,107 USD
Retailer 4$73,572 USD

34 data points across 17 retailers

29 retailers$16,639 USD to $42,014 USD

Retailer 1
-
$11,980 USD
Price last confirmed 83 days ago
B+
Retailer 2
-
$16,639 USD
View
B+
Retailer 3
-
$17,015 USD
View
Retailer 4
-
$17,015 USD
View
Price last confirmed 24 days ago
Retailer 5
-
$17,015 USD
View
Price last confirmed 32 days ago
Retailer 6
-
$17,424 USD
View
Price last confirmed 33 days ago
B+
Retailer 7
-
$17,941 USD
View
B+
Retailer 8
-
$18,071 USD
View
B+
Retailer 9
-
$18,498 USD
View
Retailer 10
-
$18,498 USD
View
Price last confirmed 22 days ago
Retailer 11
-
$18,498 USD
View
Price last confirmed 32 days ago
B+
Retailer 12
-
$19,057 USD
View
Final sale: no returns
Retailer 13
-
$19,465 USD
View
Price last confirmed 33 days ago
B+
Retailer 14
-
$19,728 USD
View
Retailer 15
-
$19,738 USD
View
Price last confirmed 29 days ago
Retailer 16
-
$19,738 USD
View
Price last confirmed 22 days ago
B+
Retailer 17
-
$21,590 USD
View
B+
Retailer 18
-
$21,728 USD
£17,109 GBP
View
B
Retailer 19
-
$28,270 USD
£22,260 GBP
View
B
Retailer 20
-
$31,003 USD
£24,412 GBP
View
B
Retailer 21
-
$33,614 USD
€32,013 EUR
View
B
Retailer 22
-
$34,191 USD
A$52,602 AUD
View
B
Retailer 23
-
$35,666 USD
View
Most Expensive
B
Cape Diamonds
cert_754595411 · Oct 29
$42,014 USD
ZAR 678,742 ZAR
View
23 more retailers have this diamond
Prices start from $16,639 USDSave up to $25,375 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.

B+
4.26ct Marquise
$16,639 USD