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Cushion|Natural|GIA

1.00ct D SI1 Cushion Natural Diamond

ID • D/SI1 • GIA 7561400377

Certificate GIA 7561400377

Diamond specifications and retailer prices

From £1,280 GBP
HK$13,400 HKD
As of November 1, 2026
Save £2,132 GBP (62%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,412 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7561400377. Listed at 18 retailers as of October 28, 2026, with prices from £1,280 to £3,412, a £2,132 spread on the same certified stone. Queensmith lists it at £3,412. 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

1.00
Carat
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7561400377
Dimensions6.69 × 4.97 × 3.34 mm
L/W Ratio1.35
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.69 mm4.97 mm1.00 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 7561400377
Side View
Table 66.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 67.3%

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 1
Current: £3,412 GBP|Low: £1,271 GBP|High: £3,441 GBP|Avg: £1,970 GBP|+2.0%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 11£1,280 GBP
Retailer 8£1,362 GBP
Retailer 7£1,509 GBP
Retailer 6£1,576 GBP
Retailer 3£1,599 GBP
Retailer 4£1,613 GBP
Retailer 9£1,666 GBP
Retailer 15£1,708 GBP
Retailer 5£1,783 GBP
Retailer 14£1,811 GBP
Retailer 2£1,858 GBP
Retailer 12£2,099 GBP
Retailer 13£2,133 GBP
Retailer 10£2,991 GBP
Queensmith£3,412 GBP

26 data points across 15 retailers

18 retailers£1,280 GBP to £3,412 GBP

A
Cheapest Retailer
-
£1,280 GBP
HK$13,400 HKD
A
Retailer 2
-
£1,362 GBP
₹173,780 INR
View
A
Retailer 3
-
£1,509 GBP
SGD 2,732 SGD
View
A
Retailer 4
-
£1,576 GBP
$2,111 USD
View
Final sale: no returns
A
Retailer 5
-
£1,599 GBP
$2,143 USD
View
A
Retailer 6
-
£1,613 GBP
$2,161 USD
View
A
Retailer 7
-
£1,625 GBP
$2,177 USD
View
A
Retailer 8
-
£1,627 GBP
$2,180 USD
View
A
Retailer 9
-
£1,666 GBP
View
A
Retailer 10
-
£1,708 GBP
$2,288 USD
View
B+
Retailer 11
-
£1,783 GBP
SGD 3,228 SGD
View
B+
Retailer 12
-
£1,811 GBP
$2,427 USD
View
B+
Retailer 13
-
£1,858 GBP
View
B+
Retailer 14
-
£2,099 GBP
ZAR 45,428 ZAR
View
B+
Retailer 15
-
£2,133 GBP
€2,722 EUR
View
Retailer 16
-
£2,133 GBP
A$4,398 AUD
View
Price last confirmed 25 days ago
B
Retailer 17
-
£2,991 GBP
View
Most Expensive
B
Queensmith
7561400377 · Oct 28
£3,412 GBP
View
17 more retailers have this diamond
Prices start from £1,280 GBPSave up to £2,132 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
1.00ct Cushion
£1,280 GBP