Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6321773138

Certificate GIA 6321773138

Diamond specifications and retailer prices

From £7,083 GBP
As of November 4, 2026
Save £4,807 GBP (40%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £12,724 GBP at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6321773138. Listed at 19 retailers as of November 4, 2026, with a 68% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.55
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6321773138
Dimensions7.36 × 7.40 × 4.62 mm
L/W Ratio1.01
Top View
7.36 mm7.40 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6321773138
Side View
Table 56.0%CrownGirdle: MediumPavilionCulet: NoneDepth 62.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £10,061 GBP|Low: £7,083 GBP|High: £12,066 GBP|Avg: £9,248 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8£7,083 GBP
Retailer 9£7,634 GBP
Retailer 3£8,107 GBP
Retailer 7£8,409 GBP
Retailer 6£8,753 GBP
Retailer 4£9,557 GBP
Retailer 1£10,061 GBP
Retailer 2£11,138 GBP
Retailer 5£11,890 GBP

34 data points across 9 retailers

19 retailers£7,083 GBP to £11,890 GBP

B
Cheapest Retailer
-
£7,083 GBP
B
Retailer 2
-
£8,107 GBP
View
B
Retailer 3
-
£8,143 GBP
View
Retailer 4
-
£8,271 GBP
View
Price last confirmed 50 days ago
Retailer 5
-
£8,409 GBP
View
Price last confirmed 14 days ago
B
Retailer 6
-
£8,753 GBP
View
Retailer 7
-
£8,753 GBP
View
Price last confirmed 7 days ago
Retailer 8
-
£8,753 GBP
View
Price last confirmed 39 days ago
Retailer 9
-
£8,753 GBP
View
Price last confirmed 23 days ago
B
Retailer 10
-
£8,779 GBP
View
B
Retailer 11
-
£8,779 GBP
View
B
Retailer 12
-
£9,070 GBP
View
Retailer 13
-
£9,543 GBP
View
Price last confirmed 48 days ago
B
Retailer 14
-
£9,557 GBP
View
Retailer 15
-
£10,044 GBP
View
Price last confirmed 14 days ago
B
Retailer 16
-
£10,061 GBP
View
B
Retailer 17
-
£11,138 GBP
View
B
Retailer 18
-
£11,890 GBP
View
Most Expensive
NZ Jewellers
610ff20b-4319-418f-b8be-e6336119932d · Sep 19
£12,724 GBP
$17,031 USD
View
Price last confirmed 48 days ago
18 more retailers have this diamond
Prices start from £7,083 GBPSave up to £4,807 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
1.55ct Round
£7,083 GBP