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Radiant|Lab Grown|IGI

1.55ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG728538606

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG728538606

Diamond specifications and retailer prices

From $297 USD
As of November 2, 2026
Save $2,613 USD (90%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: $2,910 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG728538606 or 728538606. Listed at 30 retailers as of October 31, 2026, with prices from $297 to $2,910, a $2,613 spread on the same certified stone. Brilliant Earth lists it at $2,910. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.4°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG728538606
Dimensions8.14 × 5.88 × 3.88 mm
L/W Ratio1.38
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
8.14 mm5.88 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG728538606
Side View
Table 64.0%Crown 39.4°Girdle: MediumPavilion 34.6°Culet: NoneDepth 66.0%

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: Nov 2
Current: $2,910 USD|Low: $297 USD|High: $3,350 USD|Avg: $1,231 USD|-13.1%
Brilliant Earth
Retailer 2
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Retailer 6
Retailer 7
Retailer 8
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Retailer 22
November 2, 2026
Retailer 4$297 USD
Retailer 22$356 USD
Retailer 17$525 USD
Retailer 20$538 USD
Retailer 5$572 USD
Retailer 11$630 USD
Retailer 16$659 USD
Retailer 2$702 USD
Retailer 13$728 USD
Retailer 7$827 USD
Retailer 12$921 USD
Retailer 18$949 USD
Retailer 3$1,133 USD
Retailer 9$1,417 USD
Retailer 14$1,469 USD
Retailer 8$1,500 USD
Retailer 15$1,564 USD
Retailer 19$1,633 USD
Retailer 6$1,695 USD
Retailer 21$2,455 USD
Retailer 10$2,640 USD
Brilliant Earth$2,910 USD

39 data points across 22 retailers

30 retailers$297 USD to $2,910 USD

A
Cheapest Retailer
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$297 USD
Retailer 2
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$297 USD
View
Price last confirmed 25 days ago
Retailer 3
-
$316 USD
View
Price last confirmed 33 days ago
A
Retailer 4
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$356 USD
View
Final sale: no returns
Retailer 5
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$367 USD
View
Price last confirmed 36 days ago
Retailer 6
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$369 USD
View
Price last confirmed 30 days ago
Retailer 7
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$387 USD
View
Price last confirmed 34 days ago
A
Retailer 8
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$525 USD
View
A
Retailer 9
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$538 USD
HK$4,200 HKD
View
A
Retailer 10
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$572 USD
View
A
Retailer 11
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$630 USD
View
A
Retailer 12
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$659 USD
€628 EUR
View
A
Retailer 13
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$702 USD
ZAR 11,339 ZAR
View
A
Retailer 14
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$728 USD
£573 GBP
View
A
Retailer 15
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$827 USD
View
A
Retailer 16
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$921 USD
View
A
Retailer 17
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$949 USD
A$1,460 AUD
View
B+
Retailer 18
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$1,133 USD
View
Retailer 19
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$1,308 USD
View
Price last confirmed 23 days ago
B+
Retailer 20
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$1,308 USD
View
Retailer 21
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$1,391 USD
View
Price last confirmed 32 days ago
B+
Retailer 22
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$1,417 USD
View
B+
Retailer 23
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$1,469 USD
View
B+
Retailer 24
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$1,500 USD
View
B+
Retailer 25
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$1,564 USD
SGD 2,114 SGD
View
B+
Retailer 26
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$1,633 USD
£1,286 GBP
View
Retailer 27
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$1,695 USD
A$2,607 AUD
View
Price last confirmed 28 days ago
B
Retailer 28
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$2,455 USD
View
B
Retailer 29
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$2,640 USD
View
Most Expensive
B
Brilliant Earth
16223266Y · Oct 31
$2,910 USD
View
29 more retailers have this diamond
Prices start from $297 USDSave up to $2,613 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
1.55ct Radiant
$297 USD