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Round|Lab Grown|IGI

1.71ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG447099971

Shape and cutting style on the report: Round brilliant

Certificate IGI LG447099971

Diamond specifications and retailer prices

From $950 USD
As of October 30, 2026
Save $4,219 USD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,169 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.71ct lab-grown round diamond

This 1.71ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG447099971 or 447099971. Listed at 11 retailers as of October 29, 2026, with prices from $950 to $5,169, a $4,219 spread on the same certified stone. MOH London lists it at $5,169. 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

1.71
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.8°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG447099971
Dimensions7.73 × 7.78 × 4.76 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.73 mm7.78 mm1.71 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG447099971
Side View
Table 56.0%Crown 31.8°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 61.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $5,169 USD|Low: $950 USD|High: $5,210 USD|Avg: $2,530 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2$950 USD
Retailer 4$1,552 USD
Retailer 7$1,738 USD
Retailer 5$1,800 USD
Retailer 8$1,970 USD
Retailer 9$2,434 USD
Retailer 6$2,833 USD
Retailer 3$3,183 USD
MOH London$5,169 USD

16 data points across 9 retailers

11 retailers$950 USD to $5,169 USD

A
Cheapest Retailer
-
$950 USD
B+
Retailer 2
-
$1,552 USD
View
B+
Retailer 3
-
$1,688 USD
View
B+
Retailer 4
-
$1,738 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,800 USD
View
Retailer 6
-
$1,800 USD
View
Price last confirmed 17 days ago
B+
Retailer 7
-
$1,970 USD
View
B
Retailer 8
-
$2,833 USD
View
B
Retailer 9
-
$3,183 USD
View
B
Retailer 10
-
$3,374 USD
View
Most Expensive
B
MOH London
LG447099971 · Oct 29
$5,169 USD
£4,070 GBP
View
10 more retailers have this diamond
Prices start from $950 USDSave up to $4,219 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
1.71ct Round
$950 USD