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Round|Natural|GIA

1.70ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 2528386444

Certificate GIA 2528386444

Diamond specifications and retailer prices

From £2,381 GBP
As of November 6, 2026
Save £1,385 GBP (37%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,766 GBP at Cape Diamonds · As of November 5, 2026
View at Cape Diamonds

About this 1.7ct natural round diamond

This 1.7ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2528386444. Listed at 10 retailers as of November 5, 2026, with prices from £2,381 to £3,766, a £1,385 spread on the same certified stone. Cape Diamonds lists it at £3,766. 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

1.70
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2528386444
Dimensions7.57 × 7.62 × 4.78 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.57 mm7.62 mm1.70 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2528386444
Side View
Table 55.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 63.0%

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: £3,766 GBP|Low: £2,362 GBP|High: £3,792 GBP|Avg: £2,991 GBP|+1.5%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4£2,381 GBP
Retailer 3£2,486 GBP
Retailer 5£2,774 GBP
Retailer 7£2,894 GBP
Retailer 6£3,093 GBP
Retailer 2£3,485 GBP
Cape Diamonds£3,766 GBP

43 data points across 7 retailers

10 retailers£2,381 GBP to £3,766 GBP

B+
Cheapest Retailer
-
£2,381 GBP
B+
Retailer 2
-
£2,486 GBP
View
B+
Retailer 3
-
£2,774 GBP
View
B+
Retailer 4
-
£2,894 GBP
View
B
Retailer 5
-
£2,936 GBP
View
Retailer 6
-
£3,085 GBP
View
Price last confirmed 22 days ago
B
Retailer 7
-
£3,093 GBP
View
B
Retailer 8
-
£3,195 GBP
View
B
Retailer 9
-
£3,485 GBP
View
Most Expensive
B
Cape Diamonds
cert_2528386444 · Nov 5
£3,766 GBP
ZAR 81,429 ZAR
View
9 more retailers have this diamond
Prices start from £2,381 GBPSave up to £1,385 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+
1.70ct Round
£2,381 GBP