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Round|Natural|GIA

1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 5136012626

Certificate GIA 5136012626

Diamond specifications and retailer prices

From $13,619 NZD
As of November 4, 2026
Save $5,603 NZD (29%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $27,207 NZD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5136012626. Listed at 19 retailers as of November 4, 2026, with a 41% 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
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5136012626
Dimensions6.92 × 6.91 × 4.20 mm
L/W Ratio1.00
Top View
6.92 mm6.91 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5136012626
Side View
Table 57.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 60.7%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $15,862 NZD|Low: $12,384 NZD|High: $29,721 NZD|Avg: $18,090 NZD
Retailer 1
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
Retailer 17
Retailer 18
November 6, 2026
Retailer 13$13,619 NZD
Retailer 4$13,955 NZD
Retailer 2$14,399 NZD
Retailer 10$14,861 NZD
Retailer 3$15,005 NZD
Retailer 15$15,378 NZD
Retailer 1$15,862 NZD
Retailer 9$16,581 NZD
Retailer 7$16,659 NZD
Retailer 5$16,915 NZD
Retailer 6$18,183 NZD
Retailer 8$18,183 NZD
Retailer 18$18,302 NZD
Retailer 14$18,779 NZD
Retailer 11$18,995 NZD
Retailer 17$19,222 NZD
Retailer 12$23,950 NZD
Retailer 16$25,630 NZD

37 data points across 18 retailers

19 retailers$13,619 NZD to $19,222 NZD

B
Cheapest Retailer
-
$13,619 NZD
B
Retailer 2
-
$13,955 NZD
View
B
Retailer 3
-
$14,399 NZD
View
B
Retailer 4
-
$14,861 NZD
View
Final sale: no returns
B
Retailer 5
-
$15,005 NZD
View
Retailer 6
-
$15,378 NZD
View
Price last confirmed 9 days ago
Retailer 7
-
$15,862 NZD
View
Retailer 8
-
$16,581 NZD
View
Price last confirmed 16 days ago
B
Retailer 9
-
$16,659 NZD
View
B
Retailer 10
-
$16,915 NZD
View
B
Retailer 11
-
$18,183 NZD
View
B
Retailer 12
-
$18,183 NZD
View
B
Retailer 13
-
$18,302 NZD
View
B
Retailer 14
-
$18,779 NZD
View
B
Retailer 15
-
$18,995 NZD
View
B
Retailer 16
-
$19,222 NZD
View
Retailer 17
-
$23,950 NZD
View
Price under review
Retailer 18
-
$25,630 NZD
View
Price under review
Most Expensive
Diamond Quarter
1.21SI2F5126EA3DN · Nov 5
$27,207 NZD
£11,876 GBP
View
Price under review
18 more retailers have this diamond
Prices start from $13,619 NZDSave up to $5,603 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.

B
1.21ct Round
$13,619 NZD