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Round|Lab Grown|IGI

1.70ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG665408550

Shape and cutting style on the report: Round brilliant

Certificate IGI LG665408550

Diamond specifications and retailer prices

From €233 EUR
$260 USD
As of October 29, 2026
Save €1,006 EUR (81%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €1,239 EUR at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

About this 1.7ct lab-grown round diamond

This 1.7ct 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 LG665408550 or 665408550. Listed at 20 retailers as of October 29, 2026, with prices from €233 to €1,239, a €1,006 spread on the same certified stone. Reve Diamonds lists it at €1,239. 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

1.70
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665408550
Dimensions7.68 × 7.62 × 4.74 mm
L/W Ratio1.01
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
7.68 mm7.62 mm1.70 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665408550
Side View
Table 56.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.1%

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 29
Current: €449 EUR|Low: €221 EUR|High: €1,239 EUR|Avg: €641 EUR|-0.1%
Retailer 1
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Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Reve Diamonds
November 1, 2026
Retailer 8€233 EUR
Retailer 16€269 EUR
Retailer 3€288 EUR
Retailer 4€288 EUR
Retailer 15€430 EUR
Retailer 1€449 EUR
Retailer 5€481 EUR
Retailer 12€494 EUR
Retailer 17€497 EUR
Retailer 2€530 EUR
Retailer 13€546 EUR
Retailer 11€549 EUR
Retailer 6€769 EUR
Retailer 18€850 EUR
Retailer 9€926 EUR
Retailer 7€972 EUR
Retailer 10€1,047 EUR
Retailer 14€1,161 EUR
Reve Diamonds€1,239 EUR

36 data points across 19 retailers

20 retailers€233 EUR to €1,239 EUR

A
Cheapest Retailer
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€233 EUR
$260 USD
A
Retailer 2
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€269 EUR
$301 USD
View
A
Retailer 3
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€288 EUR
$322 USD
View
A
Retailer 4
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€288 EUR
$322 USD
View
A
Retailer 5
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€430 EUR
$480 USD
View
A
Retailer 6
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€449 EUR
£395 GBP
View
A
Retailer 7
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€481 EUR
$537 USD
View
A
Retailer 8
-
€494 EUR
View
A
Retailer 9
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€497 EUR
$555 USD
View
B+
Retailer 10
-
€530 EUR
$592 USD
View
B+
Retailer 11
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€546 EUR
A$938 AUD
View
B+
Retailer 12
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€549 EUR
£483 GBP
View
B+
Retailer 13
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€769 EUR
$859 USD
View
Retailer 14
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€890 EUR
$994 USD
View
Price last confirmed 89 days ago
Retailer 15
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€918 EUR
$1,026 USD
View
Price last confirmed 41 days ago
B
Retailer 16
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€926 EUR
$1,035 USD
View
B
Retailer 17
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€972 EUR
$1,086 USD
View
B
Retailer 18
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€1,047 EUR
$1,170 USD
View
B
Retailer 19
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€1,161 EUR
£1,021 GBP
View
Most Expensive
B
Reve Diamonds
14EF649A2 · Nov 1
€1,239 EUR
$1,384 USD
View
19 more retailers have this diamond
Prices start from €233 EURSave up to €1,006 EUR

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
1.70ct Round
€233 EUR