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Cushion|Natural|GIA

0.50ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 6555666199

Certificate GIA 6555666199

Diamond specifications and retailer prices

From £290 GBP
$388 USD
As of October 31, 2026
Save £971 GBP (77%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,261 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 0.5ct natural cushion diamond

This 0.5ct natural cushion sits in the half to three-quarter 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 6555666199. Listed at 13 retailers as of October 28, 2026, with prices from £290 to £1,261, a £971 spread on the same certified stone. Queensmith lists it at £1,261. 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

0.50
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555666199
Dimensions4.67 × 4.70 × 3.16 mm
L/W Ratio1.01
Top View
4.67 mm4.70 mm0.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555666199
Side View
Table 62.0%CrownGirdlePavilionCulet: NoneDepth 67.7%

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 31
Current: £1,261 GBP|Low: £290 GBP|High: £1,355 GBP|Avg: £620 GBP|-4.0%
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
November 1, 2026
Retailer 12£290 GBP
Retailer 6£315 GBP
Retailer 2£386 GBP
Retailer 11£393 GBP
Retailer 13£407 GBP
Retailer 10£412 GBP
Retailer 8£454 GBP
Retailer 7£480 GBP
Retailer 9£484 GBP
Retailer 4£588 GBP
Retailer 5£665 GBP
Retailer 3£747 GBP
Queensmith£1,261 GBP

33 data points across 13 retailers

13 retailers£290 GBP to £1,261 GBP

A
Cheapest Retailer
-
£290 GBP
$388 USD
Final sale: no returns
A
Retailer 2
-
£315 GBP
SGD 571 SGD
View
A
Retailer 3
-
£386 GBP
View
A
Retailer 4
-
£393 GBP
View
A
Retailer 5
-
£407 GBP
$545 USD
View
A
Retailer 6
-
£412 GBP
$552 USD
View
B+
Retailer 7
-
£454 GBP
$608 USD
View
B+
Retailer 8
-
£480 GBP
€612 EUR
View
B+
Retailer 9
-
£484 GBP
ZAR 10,486 ZAR
View
Retailer 10
-
£588 GBP
$788 USD
View
Price last confirmed 14 days ago
Retailer 11
-
£665 GBP
A$1,370 AUD
View
Price last confirmed 28 days ago
Retailer 12
-
£747 GBP
View
Price last confirmed 7 days ago
Most Expensive
B
Queensmith
6555666199 · Oct 28
£1,261 GBP
View
12 more retailers have this diamond
Prices start from £290 GBPSave up to £971 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
0.50ct Cushion
£290 GBP