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Round|Natural|GIA

3.70ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2566388012

Certificate GIA 2566388012

Diamond specifications and retailer prices

From £27,083 GBP
HK$283,500 HKD
As of October 28, 2026
Save £22,339 GBP (45%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £49,422 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 3.7ct natural round diamond

This 3.7ct natural round sits in the three to five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566388012. Listed at 8 retailers as of October 26, 2026, with prices from £27,083 to £49,422, a £22,339 spread on the same certified stone. MOH London lists it at £49,422. 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

3.70
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2566388012
Dimensions9.78 × 9.84 × 6.16 mm
L/W Ratio1.01
Girdle conditionMedium to Slightly Thick
Culet sizeNone
Top View
9.78 mm9.84 mm3.70 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566388012
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.8%

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 28
Current: £49,422 GBP|Low: £27,083 GBP|High: £52,443 GBP|Avg: £35,176 GBP|-5.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 27, 2026
Retailer 6£27,083 GBP
Retailer 3£28,223 GBP
Retailer 8£29,827 GBP
Retailer 5£31,185 GBP
Retailer 2£31,418 GBP
Retailer 7£35,139 GBP
Retailer 4£38,186 GBP
MOH London£49,422 GBP

28 data points across 8 retailers

8 retailers£27,083 GBP to £49,422 GBP

A
Cheapest Retailer
-
£27,083 GBP
HK$283,500 HKD
B+
Retailer 2
-
£28,223 GBP
₹3,601,549 INR
View
Retailer 3
-
£29,827 GBP
$39,965 USD
View
Price last confirmed 15 days ago
B+
Retailer 4
-
£31,185 GBP
$41,784 USD
View
B+
Retailer 5
-
£31,418 GBP
View
Retailer 6
-
£35,139 GBP
$47,082 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
£38,186 GBP
€48,729 EUR
View
Most Expensive
B
MOH London
9A527CA8F · Oct 26
£49,422 GBP
View
7 more retailers have this diamond
Prices start from £27,083 GBPSave up to £22,339 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.

A
3.70ct Round
£27,083 GBP