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Cushion|Natural|GIA

1.57ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1189041723

Certificate GIA 1189041723

Diamond specifications and retailer prices

From £4,485 GBP
A$9,245 AUD
As of October 29, 2026
Save £2,113 GBP (32%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £6,598 GBP at Jared · As of November 2, 2026
View at Jared

About this 1.57ct natural cushion diamond

This 1.57ct natural cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1189041723. Listed at 8 retailers as of October 29, 2026, with prices from £4,485 to £6,598, a £2,113 spread on the same certified stone. Jared lists it at £6,598. 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

1.57
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1189041723
Dimensions7.09 × 6.68 × 4.34 mm
L/W Ratio1.06
Culet sizeNone
Top View
7.09 mm6.68 mm1.57 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1189041723
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 65.0%

Caratlytics Score

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

Price History

Last verified: Oct 29
Current: £6,598 GBP|Low: £4,795 GBP|High: £6,598 GBP|Avg: £6,052 GBP
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 4£4,795 GBP
Retailer 3£5,793 GBP
Retailer 5£5,986 GBP
Retailer 6£6,381 GBP
Retailer 7£6,381 GBP
Retailer 2£6,493 GBP
Jared£6,598 GBP

42 data points across 7 retailers

8 retailers£4,485 GBP to £6,598 GBP

B+
Cheapest Retailer
-
£4,485 GBP
A$9,245 AUD
Retailer 2
-
£4,795 GBP
$6,425 USD
View
Price last confirmed 14 days ago
B
Retailer 3
-
£5,793 GBP
View
B
Retailer 4
-
£5,986 GBP
$8,021 USD
View
B
Retailer 5
-
£6,381 GBP
$8,550 USD
View
B
Retailer 6
-
£6,381 GBP
$8,550 USD
View
B
Retailer 7
-
£6,493 GBP
€8,285 EUR
View
Most Expensive
B
Jared
146353184 · Nov 2
£6,598 GBP
$8,840 USD
View
7 more retailers have this diamond
Prices start from £4,485 GBPSave up to £2,113 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+
1.57ct Cushion
£4,485 GBP