Round|Natural|GIA

1.00ct D I1 Round Natural Diamond

VG • D/I1 • GIA 1425528761

Certificate GIA 1425528761

Diamond specifications and retailer prices

From £946 GBP
HK$9,900 HKD
As of October 31, 2026
Save £793 GBP (46%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £3,107 GBP at NZ Jewellers · As of October 23, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded D colour (colourless) and I1 clarity (included), with a very-good cut grade and certified by GIA 1425528761. Listed at 9 retailers as of October 30, 2026, with a 84% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
D
Colour
I1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1425528761
Dimensions6.21 × 6.25 × 4.01 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Feather, Cloud, Crystal, Cavity, Natural, Needle
Top View
6.21 mm6.25 mm1.00 ctD / I1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1425528761
Side View
Table 58.0%Crown 37°Girdle: MED-THKPavilion 40.6°Culet: NoneDepth 64.4%

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: £3,107 GBP|Low: £936 GBP|High: £3,107 GBP|Avg: £1,492 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 2£946 GBP
Retailer 3£1,114 GBP
Retailer 5£1,161 GBP
Retailer 8£1,274 GBP
Retailer 9£1,274 GBP
Retailer 6£1,332 GBP
Retailer 7£1,470 GBP
Retailer 4£1,739 GBP
NZ Jewellers£3,107 GBP

43 data points across 9 retailers

9 retailers£946 GBP to £1,739 GBP

A
Cheapest Retailer
-
£946 GBP
HK$9,900 HKD
A
Retailer 2
-
£1,114 GBP
₹142,112 INR
View
B+
Retailer 3
-
£1,161 GBP
$1,555 USD
View
B+
Retailer 4
-
£1,274 GBP
$1,707 USD
View
B+
Retailer 5
-
£1,274 GBP
$1,707 USD
View
B+
Retailer 6
-
£1,332 GBP
$1,785 USD
View
Retailer 7
-
£1,470 GBP
$1,969 USD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£1,739 GBP
€2,219 EUR
View
Most Expensive
NZ Jewellers
7c4300af-bf5d-48ad-bef3-765b9c830372 · Oct 23
£3,107 GBP
$4,163 USD
View
Price last confirmed 8 days ago
8 more retailers have this diamond
Prices start from £946 GBPSave up to £793 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 Round
£946 GBP