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Round|Lab Grown|IGI

1.21ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG817652948

Shape and cutting style on the report: Round brilliant

Certificate IGI LG817652948

Diamond specifications and retailer prices

From $406 NZD
As of November 4, 2026
Save $555 NZD (58%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,852 NZD at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG817652948 or 817652948. Listed at 16 retailers as of November 4, 2026, with a 137% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817652948
Dimensions6.86 × 6.82 × 4.14 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.86 mm6.82 mm1.21 ctH / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG817652948
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.5%

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: Nov 4
Current: $527 NZD|Low: $269 NZD|High: $2,533 NZD|Avg: $970 NZD|-22.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Reve Diamonds
November 6, 2026
Retailer 10$269 NZD
Retailer 9$406 NZD
Retailer 4$464 NZD
Retailer 1$527 NZD
Retailer 7$687 NZD
Retailer 6$706 NZD
Retailer 5$729 NZD
Retailer 2$916 NZD
Retailer 8$961 NZD
Retailer 11$1,064 NZD
Retailer 3$1,578 NZD
Reve Diamonds$1,852 NZD

34 data points across 12 retailers

16 retailers$406 NZD to $961 NZD

Retailer 1
-
$326 NZD
Price last confirmed 27 days ago
Retailer 2
-
$379 NZD
View
Price last confirmed 28 days ago
Retailer 3
-
$404 NZD
View
Price last confirmed 27 days ago
B+
Retailer 4
-
$406 NZD
View
A
Retailer 5
-
$464 NZD
View
A
Retailer 6
-
$527 NZD
View
A
Retailer 7
-
$687 NZD
View
A
Retailer 8
-
$706 NZD
View
A
Retailer 9
-
$729 NZD
View
Retailer 10
-
$801 NZD
View
Price last confirmed 11 days ago
Retailer 11
-
$916 NZD
View
Price last confirmed 11 days ago
A
Retailer 12
-
$961 NZD
View
Retailer 13
-
$1,064 NZD
View
Price last confirmed 10 days ago
Retailer 14
-
$1,300 NZD
View
Price last confirmed 28 days ago
Retailer 15
-
$1,578 NZD
View
Price last confirmed 16 days ago
Most Expensive
Reve Diamonds
CA45F42F7 · Oct 25
$1,852 NZD
$1,041 USD
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from $406 NZDSave up to $555 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
1.21ct Round
$406 NZD