Radiant|Natural|GIA

1.56ct I SI1 Radiant Natural Diamond

GD • I/SI1 • GIA 6445505545

Certificate GIA 6445505545

Diamond specifications and retailer prices

From £2,979 GBP
As of November 5, 2026
Save £3,009 GBP (50%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £6,305 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.56ct natural radiant diamond

This 1.56ct natural radiant sits in the one-and-a-half to two carat band, graded I 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 6445505545. Listed at 22 retailers as of November 4, 2026, with a 101% 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

1.56
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6445505545
Dimensions7.56 × 5.89 × 4.18 mm
L/W Ratio1.28
Top View
7.56 mm5.89 mm1.56 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6445505545
Side View
Table 74.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 71.0%

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: Nov 5
Current: £3,712 GBP|Low: £2,929 GBP|High: £6,076 GBP|Avg: £3,913 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 9£2,929 GBP
Retailer 7£3,115 GBP
Retailer 10£3,153 GBP
Retailer 8£3,219 GBP
Retailer 3£3,523 GBP
Retailer 1£3,712 GBP
Retailer 2£3,800 GBP
Retailer 4£4,201 GBP
Retailer 5£4,599 GBP
Retailer 6£5,987 GBP

36 data points across 10 retailers

22 retailers£2,979 GBP to £5,987 GBP

Retailer 1
-
£2,929 GBP
Price last confirmed 17 days ago
B+
Retailer 2
-
£2,979 GBP
View
B+
Retailer 3
-
£3,115 GBP
View
B+
Retailer 4
-
£3,153 GBP
View
Final sale: no returns
B+
Retailer 5
-
£3,219 GBP
View
B+
Retailer 6
-
£3,231 GBP
View
B+
Retailer 7
-
£3,324 GBP
View
B+
Retailer 8
-
£3,392 GBP
View
Retailer 9
-
£3,415 GBP
View
Price last confirmed 38 days ago
Retailer 10
-
£3,415 GBP
View
Price last confirmed 37 days ago
B+
Retailer 11
-
£3,523 GBP
View
B+
Retailer 12
-
£3,712 GBP
View
Retailer 13
-
£3,800 GBP
View
Price last confirmed 29 days ago
B+
Retailer 14
-
£3,833 GBP
View
B+
Retailer 15
-
£3,833 GBP
View
Retailer 16
-
£3,941 GBP
View
Price last confirmed 39 days ago
B+
Retailer 17
-
£3,967 GBP
View
Retailer 18
-
£4,162 GBP
View
Price last confirmed 15 days ago
B+
Retailer 19
-
£4,201 GBP
View
B+
Retailer 20
-
£4,599 GBP
View
B
Retailer 21
-
£5,987 GBP
View
Most Expensive
NZ Jewellers
839ae32f-3b2c-486c-9f25-6c59ac598efa · Sep 30
£6,305 GBP
$8,439 USD
View
Price last confirmed 37 days ago
21 more retailers have this diamond
Prices start from £2,979 GBPSave up to £3,009 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+
1.56ct Radiant
£2,979 GBP