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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 €2,887 EUR
HK$25,200 HKD
As of November 1, 2026
Save €3,852 EUR (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €6,739 EUR 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 €2,887 to €6,739, a €3,852 spread on the same certified stone. NZ Jewellers lists it at €6,739. 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
Color
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: €6,739 EUR|Low: €2,864 EUR|High: €6,835 EUR|Avg: €3,968 EUR|-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 1, 2026
Retailer 15€2,887 EUR
Retailer 3€2,980 EUR
Retailer 2€3,025 EUR
Retailer 6€3,084 EUR
Retailer 8€3,234 EUR
Retailer 17€3,348 EUR
Retailer 4€3,504 EUR
Retailer 7€3,504 EUR
Retailer 18€3,504 EUR
Retailer 11€3,722 EUR
Retailer 13€3,932 EUR
Retailer 16€4,010 EUR
Retailer 5€4,043 EUR
Retailer 10€4,184 EUR
Retailer 9€4,375 EUR
Retailer 14€4,755 EUR
Retailer 12€6,160 EUR
NZ Jewellers€6,739 EUR

27 data points across 18 retailers

19 retailers€2,887 EUR to €6,739 EUR

A
Cheapest Retailer
-
€2,887 EUR
HK$25,200 HKD
A
Retailer 2
-
€2,980 EUR
$3,329 USD
View
A
Retailer 3
-
€3,025 EUR
$3,380 USD
View
A
Retailer 4
-
€3,084 EUR
$3,445 USD
View
A
Retailer 5
-
€3,120 EUR
A$5,363 AUD
View
A
Retailer 6
-
€3,234 EUR
$3,613 USD
View
Final sale: no returns
A
Retailer 7
-
€3,348 EUR
$3,740 USD
View
B+
Retailer 8
-
€3,504 EUR
$3,915 USD
View
B+
Retailer 9
-
€3,504 EUR
$3,915 USD
View
B+
Retailer 10
-
€3,504 EUR
$3,915 USD
View
B+
Retailer 11
-
€3,722 EUR
£3,274 GBP
View
B+
Retailer 12
-
€3,932 EUR
£3,459 GBP
View
B+
Retailer 13
-
€3,938 EUR
$4,399 USD
View
B+
Retailer 14
-
€4,010 EUR
View
B+
Retailer 15
-
€4,043 EUR
$4,517 USD
View
Retailer 16
-
€4,184 EUR
A$7,192 AUD
View
Price last confirmed 22 days ago
B+
Retailer 17
-
€4,755 EUR
ZAR 85,812 ZAR
View
B
Retailer 18
-
€6,160 EUR
£5,419 GBP
View
Most Expensive
B
NZ Jewellers
0f95e442-1c2c-4591-b88f-0c3541ce193b · Oct 30
€6,739 EUR
$7,529 USD
View
18 more retailers have this diamond
Prices start from €2,887 EURSave up to €3,852 EUR

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
€2,887 EUR