Round|Natural|GIA

1.31ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6551231825

Certificate GIA 6551231825

Diamond specifications and retailer prices

From $6,043 NZD

$3,406 USD

As of October 27, 2026

Save $6,258 NZD (51%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: $12,301 NZD at NZ Jewellers · As of October 27, 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 6551231825. Listed at 16 retailers as of October 27, 2026, with prices from $6,043 to $12,301, a $6,258 spread on the same certified stone. NZ Jewellers lists it at $12,301. 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

Colour

SI1

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Pavilion angle40.8°

OriginNatural

Grading LabGIA

CertificateGIA 6551231825

Dimensions6.90 × 6.96 × 4.35 mm

L/W Ratio1.01

Key to symbols

Cloud, Crystal, Feather, Needle

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 6551231825

Side View

Caratlytics Score

How it works →

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: Oct 27

Current: $7,215 NZD|Low: $4,588 NZD|High: $11,873 NZD|Avg: $6,643 NZD|+1.0%

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

October 28, 2026

Retailer 2$4,588 NZD

Retailer 3$5,313 NZD

Retailer 5$5,687 NZD

Retailer 6$5,905 NZD

Retailer 13$6,043 NZD

Retailer 11$6,138 NZD

Retailer 12$6,324 NZD

Retailer 4$6,440 NZD

Retailer 10$7,024 NZD

Retailer 1$7,215 NZD

Retailer 7$7,834 NZD

Retailer 9$10,304 NZD

Retailer 8$11,826 NZD

31 data points across 13 retailers

16 retailers$6,043 NZD to $12,301 NZD

Retailer 1

$4,588 NZD

HK$20,200 HKD

Price last confirmed 18 days ago

Retailer 2

$5,313 NZD

€2,852 EUR

View

Price last confirmed 19 days ago

Retailer 3

$5,687 NZD

$3,205 USD

View

Price last confirmed 13 days ago

Retailer 4

$6,043 NZD

$3,406 USD

View

Retailer 5

$6,138 NZD

CA$4,805 CAD

View

Retailer 6

$6,269 NZD

$3,533 USD

View

Price last confirmed 19 days ago

Retailer 7

$6,324 NZD

$3,564 USD

View

Retailer 8

$6,440 NZD

SGD 4,905 SGD

View

Price last confirmed 19 days ago

Retailer 9

$6,510 NZD

$3,669 USD

View

Price last confirmed 17 days ago

B+

Retailer 10

$7,024 NZD

$3,959 USD

View

B+

Retailer 11

$7,215 NZD

£3,202 GBP

View

Retailer 12

$7,834 NZD

€4,205 EUR

View

Price last confirmed 7 days ago

Retailer 13

$10,304 NZD

$5,807 USD

View

Retailer 14

$10,921 NZD

$6,155 USD

View

Price last confirmed 19 days ago

Retailer 15

$11,826 NZD

£5,248 GBP

View

Most Expensive

NZ Jewellers

c19f5bd4-0333-40ba-8dd5-a043dfc23743 · Oct 27

$12,301 NZD

$6,933 USD

View

15 more retailers have this diamond

Prices start from $6,043 NZDSave up to $6,258 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.

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1.31ct Round

$6,043 NZD