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Oval|Natural|GIA

1.21ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 2568507379

Certificate GIA 2568507379

Diamond specifications and retailer prices

From $4,631 NZD
As of November 5, 2026
Save $3,969 NZD (46%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,599 NZD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.21ct natural oval diamond

This 1.21ct natural oval sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2568507379. Listed at 15 retailers as of November 5, 2026, with prices from $4,631 to $8,599, a $3,969 spread on the same certified stone. Helzberg Diamonds lists it at $8,599. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.9°
Pavilion angle38.65°
OriginNatural
Grading LabGIA
CertificateGIA 2568507379
Dimensions8.46 × 6.04 × 3.65 mm
L/W Ratio1.40
Culet sizeNone
Top View
8.46 mm6.04 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2568507379
Side View
Table 58.0%Crown 35.9°Girdle: STK-THKPavilion 38.65°Culet: NDepth 60.4%

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 5
Current: $8,599 NZD|Low: $4,573 NZD|High: $8,599 NZD|Avg: $6,023 NZD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 7, 2026
Retailer 11$4,631 NZD
Retailer 15$4,917 NZD
Retailer 12$4,935 NZD
Retailer 5$4,963 NZD
Retailer 14$4,970 NZD
Retailer 7$5,000 NZD
Retailer 2$5,343 NZD
Retailer 6$5,444 NZD
Retailer 16$5,843 NZD
Retailer 10$6,025 NZD
Retailer 8$6,027 NZD
Retailer 9$6,272 NZD
Retailer 13$6,319 NZD
Retailer 4$7,623 NZD
Retailer 3$8,143 NZD
Helzberg Diamonds$8,599 NZD

26 data points across 16 retailers

15 retailers$4,631 NZD to $8,599 NZD

A
Cheapest Retailer
-
$4,631 NZD
B+
Retailer 2
-
$4,917 NZD
View
B+
Retailer 3
-
$4,935 NZD
View
B+
Retailer 4
-
$4,963 NZD
View
B+
Retailer 5
-
$4,970 NZD
View
B+
Retailer 6
-
$5,000 NZD
View
B+
Retailer 7
-
$5,343 NZD
View
B+
Retailer 8
-
$5,444 NZD
View
B+
Retailer 9
-
$5,843 NZD
View
B+
Retailer 10
-
$6,025 NZD
View
B
Retailer 11
-
$6,027 NZD
View
B+
Retailer 12
-
$6,272 NZD
View
B
Retailer 13
-
$7,623 NZD
View
B
Retailer 14
-
$8,143 NZD
View
Most Expensive
B
Helzberg Diamonds
XZRILMOLGNJNP · Nov 6
$8,599 NZD
$4,767 USD
View
14 more retailers have this diamond
Prices start from $4,631 NZDSave up to $3,969 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 Oval
$4,631 NZD