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Round|Natural|GIA

1.31ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 5566309285

Certificate GIA 5566309285

Diamond specifications and retailer prices

From $5,733 NZD
HK$25,200 HKD
As of November 1, 2026
Save $7,648 NZD (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $13,381 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 5566309285. Listed at 19 retailers as of October 30, 2026, with prices from $5,733 to $13,381, a $7,648 spread on the same certified stone. NZ Jewellers lists it at $13,381. 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 angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5566309285
Dimensions6.93 × 6.97 × 4.35 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle
Top View
6.93 mm6.97 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5566309285
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

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: $13,381 NZD|Low: $5,687 NZD|High: $13,571 NZD|Avg: $7,877 NZD|-1.4%
NZ Jewellers
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 2, 2026
Retailer 16$5,733 NZD
Retailer 3$5,917 NZD
Retailer 13$6,007 NZD
Retailer 6$6,123 NZD
Retailer 8$6,421 NZD
Retailer 17$6,647 NZD
Retailer 4$6,958 NZD
Retailer 7$6,958 NZD
Retailer 18$6,958 NZD
Retailer 2$7,389 NZD
Retailer 12$7,808 NZD
Retailer 11$7,927 NZD
Retailer 5$8,028 NZD
Retailer 10$8,308 NZD
Retailer 9$8,687 NZD
Retailer 15$9,441 NZD
Retailer 14$12,232 NZD
NZ Jewellers$13,381 NZD

28 data points across 18 retailers

19 retailers$5,733 NZD to $13,381 NZD

A
Cheapest Retailer
-
$5,733 NZD
HK$25,200 HKD
A
Retailer 2
-
$5,917 NZD
$3,329 USD
View
A
Retailer 3
-
$6,007 NZD
$3,380 USD
View
A
Retailer 4
-
$6,123 NZD
$3,445 USD
View
A
Retailer 5
-
$6,196 NZD
A$5,363 AUD
View
A
Retailer 6
-
$6,421 NZD
$3,613 USD
View
Final sale: no returns
A
Retailer 7
-
$6,647 NZD
$3,740 USD
View
B+
Retailer 8
-
$6,958 NZD
$3,915 USD
View
B+
Retailer 9
-
$6,958 NZD
$3,915 USD
View
B+
Retailer 10
-
$6,958 NZD
$3,915 USD
View
B+
Retailer 11
-
$7,389 NZD
£3,274 GBP
View
B+
Retailer 12
-
$7,808 NZD
£3,459 GBP
View
B+
Retailer 13
-
$7,818 NZD
$4,399 USD
View
B+
Retailer 14
-
$7,927 NZD
€4,248 EUR
View
B+
Retailer 15
-
$8,028 NZD
$4,517 USD
View
Retailer 16
-
$8,308 NZD
A$7,192 AUD
View
Price last confirmed 23 days ago
B+
Retailer 17
-
$9,441 NZD
ZAR 85,812 ZAR
View
B
Retailer 18
-
$12,232 NZD
£5,419 GBP
View
Most Expensive
B
NZ Jewellers
0f95e442-1c2c-4591-b88f-0c3541ce193b · Oct 30
$13,381 NZD
$7,529 USD
View
18 more retailers have this diamond
Prices start from $5,733 NZDSave up to $7,648 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
$5,733 NZD