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Round|Natural|GIA

1.31ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1528408616

Certificate GIA 1528408616

Diamond specifications and retailer prices

From $6,540 NZD
$3,680 USD
As of November 1, 2026
Save $3,825 NZD (37%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $11,883 NZD at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.31ct natural round diamond

This 1.31ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1528408616. Listed at 15 retailers as of October 31, 2026, with a 58% 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

1.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1528408616
Dimensions6.92 × 6.97 × 4.35 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
6.92 mm6.97 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1528408616
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.7%

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 1
Current: $8,332 NZD|Low: $5,878 NZD|High: $11,883 NZD|Avg: $8,401 NZD|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Wholesale Diamonds Direct
November 3, 2026
Retailer 6$6,540 NZD
Retailer 2$6,722 NZD
Retailer 7$7,052 NZD
Retailer 9$7,251 NZD
Retailer 10$7,900 NZD
Retailer 8$8,087 NZD
Retailer 1$8,332 NZD
Retailer 3$8,743 NZD
Retailer 5$9,412 NZD
Retailer 4$10,366 NZD
Wholesale Diamonds Direct$11,883 NZD

41 data points across 11 retailers

15 retailers$6,540 NZD to $10,366 NZD

A
Cheapest Retailer
-
$6,540 NZD
$3,680 USD
A
Retailer 2
-
$6,722 NZD
$3,782 USD
View
B+
Retailer 3
-
$7,052 NZD
$3,968 USD
View
Final sale: no returns
B+
Retailer 4
-
$7,251 NZD
$4,080 USD
View
B+
Retailer 5
-
$7,900 NZD
A$6,838 AUD
View
B+
Retailer 6
-
$8,087 NZD
$4,550 USD
View
B+
Retailer 7
-
$8,096 NZD
$4,555 USD
View
B+
Retailer 8
-
$8,332 NZD
£3,691 GBP
View
B
Retailer 9
-
$8,602 NZD
$4,840 USD
View
B
Retailer 10
-
$8,602 NZD
$4,840 USD
View
B+
Retailer 11
-
$8,743 NZD
€4,685 EUR
View
B
Retailer 12
-
$8,887 NZD
$5,000 USD
View
B+
Retailer 13
-
$9,412 NZD
£4,170 GBP
View
B
Retailer 14
-
$10,366 NZD
ZAR 94,221 ZAR
View
Most Expensive
Wholesale Diamonds Direct
269988471 · Oct 26
$11,883 NZD
$6,686 USD
View
Price last confirmed 7 days ago
14 more retailers have this diamond
Prices start from $6,540 NZDSave up to $3,825 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
1.31ct Round
$6,540 NZD