CaratHunter
Plans
Radiant|Natural|GIA

1.20ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 5231970791

Certificate GIA 5231970791

Diamond specifications and retailer prices

From £1,549 GBP
As of November 5, 2026
Save £2,847 GBP (65%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,396 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural radiant diamond

This 1.2ct natural radiant sits in the classic one-carat band, graded I 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 5231970791. Listed at 8 retailers as of November 5, 2026, with prices from £1,549 to £4,396, a £2,847 spread on the same certified stone. NZ Jewellers lists it at £4,396. 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

1.20
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Pavilion angle60.33°
OriginNatural
Grading LabGIA
CertificateGIA 5231970791
Dimensions7.10 × 5.34 × 3.67 mm
L/W Ratio1.33
Key to symbols
Cloud, Crystal, Feather, Needle, Natural
Top View
7.10 mm5.34 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 5231970791
Side View
Table 67.0%CrownGirdle: ThickPavilion 60.33°Culet: NoneDepth 68.7%

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 5
Current: £4,396 GBP|Low: £1,549 GBP|High: £4,717 GBP|Avg: £2,605 GBP|+10.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 4£1,549 GBP
Retailer 7£2,002 GBP
Retailer 5£2,103 GBP
Retailer 3£2,155 GBP
Retailer 2£2,184 GBP
Retailer 8£2,276 GBP
Retailer 6£3,712 GBP
NZ Jewellers£4,396 GBP

33 data points across 8 retailers

8 retailers£1,549 GBP to £4,396 GBP

A
Cheapest Retailer
-
£1,549 GBP
B+
Retailer 2
-
£2,002 GBP
View
Final sale: no returns
B+
Retailer 3
-
£2,103 GBP
View
B+
Retailer 4
-
£2,155 GBP
View
B+
Retailer 5
-
£2,184 GBP
View
B
Retailer 6
-
£2,276 GBP
View
B
Retailer 7
-
£3,712 GBP
View
Most Expensive
B
NZ Jewellers
823fe09c-94bc-410d-a984-a81c7c49cc42 · Nov 5
£4,396 GBP
$5,884 USD
View
7 more retailers have this diamond
Prices start from £1,549 GBPSave up to £2,847 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
1.20ct Radiant
£1,549 GBP