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1.31ct L SI1 Round Natural Diamond

EX • L/SI1 • GIA 5563656266

Certificate GIA 5563656266

Diamond specifications and retailer prices

From £1,274 GBP
As of November 6, 2026
Save £511 GBP (29%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,786 GBP at Frank Darling · As of November 6, 2026
View at Frank Darling

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 L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5563656266. Listed at 4 retailers as of November 6, 2026, with prices from £1,274 to £1,786, a £511 spread on the same certified stone. Frank Darling lists it at £1,786. 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
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5563656266
Dimensions6.96 × 6.92 × 4.33 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.96 mm6.92 mm1.31 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5563656266
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°CuletDepth 62.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,786 GBP|Low: £1,274 GBP|High: £1,786 GBP|Avg: £1,678 GBP
Frank Darling
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 2£1,274 GBP
Retailer 3£1,725 GBP
Retailer 4£1,772 GBP
Frank Darling£1,786 GBP

2 data points across 4 retailers

4 retailers£1,274 GBP to £1,786 GBP

Cheapest Retailer
-
£1,274 GBP
B+
Retailer 2
-
£1,725 GBP
View
B
Retailer 3
-
£1,772 GBP
View
Most Expensive
B
Frank Darling
ZSMIB041DD · Nov 6
£1,786 GBP
$2,403 USD
View
3 more retailers have this diamond
Prices start from £1,274 GBPSave up to £511 GBP

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.

B+
1.31ct Round
£1,274 GBP