CaratHunter
Plans
Cushion|Natural|GIA

1.70ct K SI1 Cushion Natural Diamond

ID • K/SI1 • GIA 6545515020

Certificate GIA 6545515020

Diamond specifications and retailer prices

From £2,951 GBP
As of November 5, 2026
Save £2,204 GBP (43%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £5,155 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.7ct natural cushion diamond

This 1.7ct natural cushion sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545515020. Listed at 6 retailers as of November 4, 2026, with prices from £2,951 to £5,155, a £2,204 spread on the same certified stone. MOH London lists it at £5,155. 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
K
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6545515020
Dimensions7.62 × 6.14 × 4.23 mm
L/W Ratio1.24
Top View
7.62 mm6.14 mm1.70 ctK / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545515020
Side View
Table 60.0%CrownGirdle: ThickPavilionCulet: NoneDepth 68.9%

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 5
Current: £5,155 GBP|Low: £2,587 GBP|High: £5,231 GBP|Avg: £3,398 GBP|+4.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8£2,587 GBP
Retailer 5£2,951 GBP
Retailer 7£2,959 GBP
Retailer 6£3,091 GBP
Retailer 4£3,133 GBP
Retailer 2£3,478 GBP
Retailer 3£3,772 GBP
MOH London£5,155 GBP

44 data points across 8 retailers

6 retailers£2,951 GBP to £5,155 GBP

A
Cheapest Retailer
-
£2,951 GBP
Retailer 2
-
£3,091 GBP
View
Price last confirmed 30 days ago
B+
Retailer 3
-
£3,133 GBP
View
B+
Retailer 4
-
£3,478 GBP
View
B
Retailer 5
-
£3,772 GBP
View
Most Expensive
B
MOH London
2F8648C25 · Nov 4
£5,155 GBP
View
5 more retailers have this diamond
Prices start from £2,951 GBPSave up to £2,204 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
1.70ct Cushion
£2,951 GBP