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Cushion|Lab Grown|IGI

1.00ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG689561775

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG689561775

Diamond specifications and retailer prices

From $334 NZD
$188 USD
As of November 1, 2026
Save $1,602 NZD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,935 NZD at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG689561775 or 689561775. Listed at 13 retailers as of November 1, 2026, with prices from $334 to $1,935, a $1,602 spread on the same certified stone. Reve Diamonds lists it at $1,935. 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

1.00
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle43.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689561775
Dimensions6.04 × 6.01 × 3.97 mm
L/W Ratio1.00
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
6.04 mm6.01 mm1.00 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689561775
Side View
Table 62.0%Crown 36.6°Girdle: MED-THKPavilion 43.7°Culet: NoneDepth 66.1%

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: Nov 1
Current: $656 NZD|Low: $330 NZD|High: $1,935 NZD|Avg: $898 NZD|+4.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
November 2, 2026
Retailer 12$334 NZD
Retailer 11$369 NZD
Retailer 7$571 NZD
Retailer 1$656 NZD
Retailer 10$662 NZD
Retailer 6$712 NZD
Retailer 4$718 NZD
Retailer 8$797 NZD
Retailer 9$962 NZD
Retailer 3$1,029 NZD
Retailer 2$1,284 NZD
Retailer 5$1,726 NZD
Reve Diamonds$1,935 NZD

45 data points across 13 retailers

13 retailers$334 NZD to $1,935 NZD

A
Cheapest Retailer
-
$334 NZD
$188 USD
Final sale: no returns
Retailer 2
-
$369 NZD
$208 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$571 NZD
$322 USD
View
A
Retailer 4
-
$656 NZD
£291 GBP
View
A
Retailer 5
-
$662 NZD
$373 USD
View
B+
Retailer 6
-
$712 NZD
€382 EUR
View
Retailer 7
-
$718 NZD
£318 GBP
View
Price last confirmed 19 days ago
B+
Retailer 8
-
$797 NZD
$449 USD
View
B
Retailer 9
-
$962 NZD
$542 USD
View
B+
Retailer 10
-
$1,029 NZD
$580 USD
View
B
Retailer 11
-
$1,284 NZD
$723 USD
View
B
Retailer 12
-
$1,726 NZD
£766 GBP
View
Most Expensive
B
Reve Diamonds
C99BFAB20 · Nov 1
$1,935 NZD
$1,091 USD
View
12 more retailers have this diamond
Prices start from $334 NZDSave up to $1,602 NZD

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
1.00ct Cushion
$334 NZD