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Round|Lab Grown|IGI

1.72ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG455032750

Shape and cutting style on the report: Round brilliant

Certificate IGI LG455032750

Diamond specifications and retailer prices

From $263 USD
As of October 28, 2026
Save $917 USD (78%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,180 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.72ct lab-grown round diamond

This 1.72ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG455032750 or 455032750. Listed at 15 retailers as of October 28, 2026, with prices from $263 to $1,180, a $917 spread on the same certified stone. Brilliant Earth lists it at $1,180. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.72
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG455032750
Dimensions7.66 × 7.62 × 4.76 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by high pressure high temperature process (HPHT).
Top View
7.66 mm7.62 mm1.72 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG455032750
Side View
Table 59.5%Crown 35.6°GirdlePavilion 41.3°Culet: NoneDepth 62.4%

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 28
Current: $1,180 USD|Low: $263 USD|High: $1,510 USD|Avg: $664 USD|-21.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 11$263 USD
Retailer 4$325 USD
Retailer 12$395 USD
Retailer 7$458 USD
Retailer 3$490 USD
Retailer 5$528 USD
Retailer 2$549 USD
Retailer 9$557 USD
Retailer 8$769 USD
Retailer 10$992 USD
Retailer 6$1,173 USD
Brilliant Earth$1,180 USD

42 data points across 12 retailers

15 retailers$263 USD to $1,180 USD

A
Retailer 1
-
$262 USD
Price last confirmed 37 days ago
A
Retailer 2
-
$263 USD
View
Final sale: no returns
A
Retailer 3
-
$304 USD
View
Price last confirmed 37 days ago
A
Retailer 4
-
$320 USD
View
Price last confirmed 34 days ago
B+
Retailer 5
-
$395 USD
View
A
Retailer 6
-
$458 USD
£361 GBP
View
Price last confirmed 12 days ago
A
Retailer 7
-
$528 USD
€503 EUR
View
A
Retailer 8
-
$549 USD
£433 GBP
View
A
Retailer 9
-
$557 USD
View
B
Retailer 10
-
$769 USD
View
B
Retailer 11
-
$910 USD
View
Price last confirmed 37 days ago
B
Retailer 12
-
$992 USD
View
B
Retailer 13
-
$1,043 USD
View
Price last confirmed 38 days ago
B
Retailer 14
-
$1,173 USD
£924 GBP
View
Most Expensive
B
Brilliant Earth
14242415A · Oct 29
$1,180 USD
View
14 more retailers have this diamond
Prices start from $263 USDSave up to $917 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
1.72ct Round
$263 USD