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Round|Natural|GIA

1.31ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6551231825

Certificate GIA 6551231825

Diamond specifications and retailer prices

From €3,048 EUR
$3,406 USD
As of October 27, 2026
Save €3,157 EUR (51%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €6,206 EUR 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 €3,048 to €6,206, a €3,157 spread on the same certified stone. NZ Jewellers lists it at €6,206. 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
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
Top View
6.90 mm6.96 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551231825
Side View
Table 58.0%CrownGirdle: 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: Oct 27
Current: €3,640 EUR|Low: €2,314 EUR|High: €5,990 EUR|Avg: €3,342 EUR|+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€2,314 EUR
Retailer 3€2,680 EUR
Retailer 5€2,869 EUR
Retailer 6€2,979 EUR
Retailer 13€3,048 EUR
Retailer 11€3,097 EUR
Retailer 12€3,190 EUR
Retailer 4€3,249 EUR
Retailer 10€3,544 EUR
Retailer 1€3,640 EUR
Retailer 7€3,952 EUR
Retailer 9€5,198 EUR
Retailer 8€5,966 EUR

32 data points across 13 retailers

16 retailers€3,048 EUR to €6,206 EUR

Retailer 1
-
€2,314 EUR
HK$20,200 HKD
Price last confirmed 17 days ago
Retailer 2
-
€2,680 EUR
View
Price last confirmed 18 days ago
Retailer 3
-
€2,869 EUR
$3,205 USD
View
Price last confirmed 12 days ago
A
Retailer 4
-
€3,048 EUR
$3,406 USD
View
A
Retailer 5
-
€3,097 EUR
CA$4,805 CAD
View
Retailer 6
-
€3,162 EUR
$3,533 USD
View
Price last confirmed 18 days ago
A
Retailer 7
-
€3,190 EUR
$3,564 USD
View
Retailer 8
-
€3,249 EUR
SGD 4,905 SGD
View
Price last confirmed 18 days ago
Retailer 9
-
€3,284 EUR
$3,669 USD
View
Price last confirmed 16 days ago
B+
Retailer 10
-
€3,544 EUR
$3,959 USD
View
B+
Retailer 11
-
€3,640 EUR
£3,202 GBP
View
B+
Retailer 12
-
€3,952 EUR
View
B
Retailer 13
-
€5,198 EUR
$5,807 USD
View
Retailer 14
-
€5,509 EUR
$6,155 USD
View
Price last confirmed 18 days ago
B
Retailer 15
-
€5,966 EUR
£5,248 GBP
View
Most Expensive
B
NZ Jewellers
c19f5bd4-0333-40ba-8dd5-a043dfc23743 · Oct 27
€6,206 EUR
$6,933 USD
View
15 more retailers have this diamond
Prices start from €3,048 EURSave up to €3,157 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
€3,048 EUR