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Heart|Natural|GIA

0.55ct G SI1 Heart Natural Diamond

GD • G/SI1 • GIA 7521619695

Certificate GIA 7521619695

Diamond specifications and retailer prices

From £323 GBP
As of November 6, 2026
Save £111 GBP (25%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £434 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.55ct natural heart diamond

This 0.55ct natural heart sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 7521619695. Listed at 5 retailers as of November 5, 2026, with prices from £323 to £434, a £111 spread on the same certified stone. Blue Nile lists it at £434. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.55
Carat
G
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7521619695
Dimensions5.09 × 5.81 × 3.24 mm
L/W Ratio1.14
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather
Top View
5.09 mm5.81 mm0.55 ctG / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 7521619695
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 55.7%

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: Nov 6
Current: £434 GBP|Low: £308 GBP|High: £505 GBP|Avg: £390 GBP|-14.1%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 3£323 GBP
Retailer 4£334 GBP
Retailer 5£362 GBP
Retailer 2£414 GBP
Blue Nile£434 GBP

40 data points across 5 retailers

5 retailers£323 GBP to £434 GBP

A
Cheapest Retailer
-
£323 GBP
A
Retailer 2
-
£334 GBP
View
Final sale: no returns
B+
Retailer 3
-
£362 GBP
View
B+
Retailer 4
-
£414 GBP
View
Most Expensive
B+
Blue Nile
25799063 · Nov 5
£434 GBP
$581 USD
View
4 more retailers have this diamond
Prices start from £323 GBPSave up to £111 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
0.55ct Heart
£323 GBP