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Round|Natural|GIA

1.50ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6505156143

Certificate GIA 6505156143

Diamond specifications and retailer prices

From £6,657 GBP
$8,920 USD
As of October 25, 2026
Save £7,055 GBP (51%) vs most expensive(unlock to see where)
33 retailers carry this diamond
Most expensive: £13,713 GBP at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6505156143. Listed at 33 retailers as of October 25, 2026, with prices from £6,657 to £13,713, a £7,055 spread on the same certified stone. Diamond Quarter lists it at £13,713. 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

1.50
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6505156143
Dimensions7.42 × 7.38 × 4.43 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.42 mm7.38 mm1.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6505156143
Side View
Table 60.0%Crown 32°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.0%

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 25
Current: £8,780 GBP|Low: £6,059 GBP|High: £12,681 GBP|Avg: £8,694 GBP|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
October 30, 2026
Retailer 20£6,657 GBP
Retailer 4£6,821 GBP
Retailer 18£7,270 GBP
Retailer 7£7,503 GBP
Retailer 2£7,608 GBP
Retailer 8£7,608 GBP
Retailer 9£8,131 GBP
Retailer 12£8,159 GBP
Retailer 11£8,242 GBP
Retailer 21£8,369 GBP
Retailer 17£8,380 GBP
Retailer 10£8,445 GBP
Retailer 5£8,482 GBP
Retailer 1£8,780 GBP
Retailer 13£9,069 GBP
Retailer 14£9,264 GBP
Retailer 15£9,482 GBP
Retailer 6£9,510 GBP
Retailer 19£10,961 GBP
Retailer 16£11,946 GBP
Retailer 3£12,681 GBP

31 data points across 21 retailers

33 retailers£6,657 GBP to £13,713 GBP

A
Cheapest Retailer
-
£6,657 GBP
$8,920 USD
B+
Retailer 2
-
£6,821 GBP
$9,139 USD
View
B+
Retailer 3
-
£6,926 GBP
$9,280 USD
View
B+
Retailer 4
-
£7,060 GBP
$9,459 USD
View
B+
Retailer 5
-
£7,252 GBP
$9,717 USD
View
B+
Retailer 6
-
£7,270 GBP
$9,742 USD
View
B+
Retailer 7
-
£7,503 GBP
CA$13,962 CAD
View
B+
Retailer 8
-
£7,523 GBP
$10,080 USD
View
B+
Retailer 9
-
£7,608 GBP
$10,194 USD
View
Final sale: no returns
B+
Retailer 10
-
£7,608 GBP
$10,194 USD
View
B+
Retailer 11
-
£8,116 GBP
$10,874 USD
View
B+
Retailer 12
-
£8,131 GBP
$10,895 USD
View
B+
Retailer 13
-
£8,159 GBP
View
B+
Retailer 14
-
£8,242 GBP
$11,044 USD
View
B+
Retailer 15
-
£8,369 GBP
$11,214 USD
View
Retailer 16
-
£8,380 GBP
A$17,274 AUD
View
Price last confirmed 7 days ago
B+
Retailer 17
-
£8,445 GBP
$11,316 USD
View
B+
Retailer 18
-
£8,446 GBP
$11,316 USD
View
B+
Retailer 19
-
£8,482 GBP
$11,365 USD
View
Retailer 20
-
£8,501 GBP
$11,391 USD
View
Price last confirmed 8 days ago
B+
Retailer 21
-
£8,780 GBP
View
B
Retailer 22
-
£8,911 GBP
$11,940 USD
View
B
Retailer 23
-
£8,911 GBP
$11,940 USD
View
B
Retailer 24
-
£9,068 GBP
$12,150 USD
View
B
Retailer 25
-
£9,069 GBP
$12,152 USD
View
B
Retailer 26
-
£9,202 GBP
$12,330 USD
View
B
Retailer 27
-
£9,264 GBP
$12,412 USD
View
B
Retailer 28
-
£9,482 GBP
€12,100 EUR
View
B
Retailer 29
-
£9,510 GBP
$12,743 USD
View
Retailer 30
-
£10,961 GBP
ZAR 237,269 ZAR
View
Price last confirmed 9 days ago
B
Retailer 31
-
£11,946 GBP
View
B
Retailer 32
-
£12,681 GBP
$16,991 USD
View
Most Expensive
B
Diamond Quarter
1.5SI1D65439546KG · Oct 29
£13,713 GBP
View
32 more retailers have this diamond
Prices start from £6,657 GBPSave up to £7,055 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
1.50ct Round
£6,657 GBP