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Radiant|Natural|GIA

0.55ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 6221459388

Certificate GIA 6221459388

Diamond specifications and retailer prices

From £706 GBP
$947 USD
As of October 31, 2026
Save £382 GBP (35%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,088 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 0.55ct natural radiant diamond

This 0.55ct natural radiant sits in the half to three-quarter carat band, graded H 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 6221459388. Listed at 3 retailers as of October 31, 2026, with prices from £706 to £1,088, a £382 spread on the same certified stone. 77 Diamonds lists it at £1,088. 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

0.55
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6221459388
Dimensions5.81 × 4.23 × 2.72 mm
L/W Ratio1.37
Top View
5.81 mm4.23 mm0.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6221459388
Side View
Table 67.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 64.2%

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 31
Current: £1,088 GBP|Low: £706 GBP|High: £1,090 GBP|Avg: £906 GBP|+2.2%
77 Diamonds
Retailer 2
Retailer 3
November 2, 2026
Retailer 2£706 GBP
Retailer 3£931 GBP
77 Diamonds£1,088 GBP

30 data points across 3 retailers

3 retailers£706 GBP to £1,088 GBP

B+
Cheapest Retailer
-
£706 GBP
$947 USD
B
Retailer 2
-
£931 GBP
$1,250 USD
View
Most Expensive
B
77 Diamonds
RADMBGBNYCZQX · Nov 2
£1,088 GBP
View
2 more retailers have this diamond
Prices start from £706 GBPSave up to £382 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+
0.55ct Radiant
£706 GBP