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Round|Natural|GIA

1.59ct I SI1 Round Natural Diamond

VG • I/SI1 • GIA 1236966257

Certificate GIA 1236966257

Diamond specifications and retailer prices

From £8,398 GBP
As of November 1, 2026
Save £3,744 GBP (31%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £12,142 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.59ct natural round diamond

This 1.59ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 1236966257. Listed at 4 retailers as of November 1, 2026, with prices from £8,398 to £12,142, a £3,744 spread on the same certified stone. MOH London lists it at £12,142. 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

1.59
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishGood
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1236966257
Dimensions7.55 × 7.67 × 4.49 mm
L/W Ratio1.02
Top View
7.55 mm7.67 mm1.59 ctI / SI1
OriginNatural
CutVery Good
PolishGood
SymmetryGood
FluorescenceNone
CertificateGIA 1236966257
Side View
Table 65.0%CrownGirdlePavilionCulet: NoneDepth 59.0%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £12,142 GBP|Low: £8,001 GBP|High: £12,288 GBP|Avg: £9,372 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 5£8,001 GBP
Retailer 3£8,398 GBP
Retailer 4£8,575 GBP
Retailer 2£9,467 GBP
MOH London£12,142 GBP

41 data points across 5 retailers

4 retailers£8,398 GBP to £12,142 GBP

B
Cheapest Retailer
-
£8,398 GBP
Retailer 2
-
£8,575 GBP
A$17,676 AUD
View
Price last confirmed 9 days ago
C
Retailer 3
-
£9,467 GBP
€12,081 EUR
View
Most Expensive
C
MOH London
E646EA968 · Nov 1
£12,142 GBP
View
3 more retailers have this diamond
Prices start from £8,398 GBPSave up to £3,744 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
1.59ct Round
£8,398 GBP