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Round|Natural|GIA

1.30ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 2528810151

Certificate GIA 2528810151

Diamond specifications and retailer prices

From $4,759 NZD
As of November 4, 2026
Save $5,652 NZD (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $10,874 NZD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2528810151. Listed at 18 retailers as of November 4, 2026, with a 119% 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

1.30
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceVery Strong
Crown angle33°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2528810151
Dimensions6.97 × 7.00 × 4.31 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.97 mm7.00 mm1.30 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceVery Strong
CertificateGIA 2528810151
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.7%

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: $6,616 NZD|Low: $4,759 NZD|High: $10,672 NZD|Avg: $6,573 NZD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10$4,759 NZD
Retailer 7$4,970 NZD
Retailer 8$5,545 NZD
Retailer 2$5,762 NZD
Retailer 6$5,968 NZD
Retailer 11$6,242 NZD
Retailer 4$6,420 NZD
Retailer 1$6,616 NZD
Retailer 3$6,754 NZD
Retailer 5$7,251 NZD
Retailer 9$10,410 NZD

30 data points across 11 retailers

18 retailers$4,759 NZD to $10,410 NZD

A
Cheapest Retailer
-
$4,759 NZD
A
Retailer 2
-
$4,970 NZD
View
A
Retailer 3
-
$5,545 NZD
View
A
Retailer 4
-
$5,671 NZD
View
A
Retailer 5
-
$5,762 NZD
View
Final sale: no returns
A
Retailer 6
-
$5,837 NZD
View
A
Retailer 7
-
$5,844 NZD
View
A
Retailer 8
-
$5,968 NZD
View
Retailer 9
-
$6,242 NZD
View
Price last confirmed 17 days ago
Retailer 10
-
$6,242 NZD
View
Price last confirmed 21 days ago
A
Retailer 11
-
$6,420 NZD
View
Retailer 12
-
$6,482 NZD
View
Price last confirmed 22 days ago
A
Retailer 13
-
$6,616 NZD
View
Retailer 14
-
$6,754 NZD
View
Price last confirmed 29 days ago
Retailer 15
-
$7,203 NZD
View
Price last confirmed 19 days ago
A
Retailer 16
-
$7,251 NZD
View
B
Retailer 17
-
$10,410 NZD
View
Most Expensive
NZ Jewellers
850537c0-77a6-497c-ab10-3d486638b5d1 · Oct 17
$10,874 NZD
$6,113 USD
View
Price last confirmed 19 days ago
17 more retailers have this diamond
Prices start from $4,759 NZDSave up to $5,652 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
1.30ct Round
$4,759 NZD