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1.51ct D SI2 Round Natural Diamond

VG • D/SI2 • GIA 6312930159

Shape and cutting style on the report: Round brilliant

Certificate GIA 6312930159

Diamond specifications and retailer prices

From £6,012 GBP
$8,055 USD
As of October 25, 2026
Save £6,862 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £12,874 GBP at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 6312930159. Listed at 15 retailers as of October 25, 2026, with prices from £6,012 to £12,874, a £6,862 spread on the same certified stone. Diamond Quarter lists it at £12,874. 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

1.51
Carat
D
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6312930159
Dimensions7.25 × 7.13 × 4.54 mm
L/W Ratio1.02
Star length50%
Lower girdle80%
Top View
7.25 mm7.13 mm1.51 ctD / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6312930159
Side View
Table 58.0%Crown 37.5°Girdle: STK-THKPavilion 40.6°Culet: NoneDepth 63.7%

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: Oct 25
Current: £8,434 GBP|Low: £5,937 GBP|High: £8,434 GBP|Avg: £7,217 GBP|+4.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 9£5,937 GBP
Retailer 5£6,012 GBP
Retailer 7£6,254 GBP
Retailer 3£6,925 GBP
Retailer 8£7,085 GBP
Retailer 6£7,240 GBP
Retailer 4£7,411 GBP
Retailer 2£7,948 GBP
Retailer 11£7,948 GBP
Retailer 10£8,217 GBP
Retailer 1£8,434 GBP

39 data points across 11 retailers

15 retailers£6,012 GBP to £12,874 GBP

B+
Cheapest Retailer
-
£6,012 GBP
$8,055 USD
B+
Retailer 2
-
£6,254 GBP
$8,380 USD
View
B+
Retailer 3
-
£6,377 GBP
$8,544 USD
View
B+
Retailer 4
-
£6,414 GBP
$8,594 USD
View
B+
Retailer 5
-
£6,775 GBP
CA$12,608 CAD
View
B+
Retailer 6
-
£6,925 GBP
$9,279 USD
View
B+
Retailer 7
-
£7,085 GBP
$9,493 USD
View
B+
Retailer 8
-
£7,240 GBP
SGD 13,109 SGD
View
B+
Retailer 9
-
£7,411 GBP
View
B
Retailer 10
-
£7,948 GBP
$10,650 USD
View
B
Retailer 11
-
£7,948 GBP
$10,650 USD
View
B
Retailer 12
-
£8,122 GBP
$10,882 USD
View
B
Retailer 13
-
£8,217 GBP
$11,010 USD
View
B
Retailer 14
-
£8,434 GBP
€10,762 EUR
View
Most Expensive
B
Diamond Quarter
1.51SI2D6359E8AAN · Oct 29
£12,874 GBP
View
14 more retailers have this diamond
Prices start from £6,012 GBPSave up to £6,862 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+
1.51ct Round
£6,012 GBP