Round|Natural|GIA

1.50ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6505156143

Certificate GIA 6505156143

Diamond specifications and retailer prices

From $11,436 SGD

$8,920 USD

As of October 25, 2026

Save $12,120 SGD (51%) vs most expensive(unlock to see where)

33 retailers carry this diamond

Most expensive: $23,557 SGD at Diamond Quarter · As of October 28, 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 $11,436 to $23,557, a $12,120 spread on the same certified stone. Diamond Quarter lists it at $23,557. 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

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%

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 6505156143

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 25

Current: $13,974 SGD|Low: $10,408 SGD|High: $21,784 SGD|Avg: $15,009 SGD|-0.7%

Retailer 1

Retailer 2

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Retailer 6

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Retailer 10

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Retailer 15

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Retailer 19

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Retailer 21

October 29, 2026

Retailer 20$11,436 SGD

Retailer 4$11,717 SGD

Retailer 18$12,490 SGD

Retailer 7$12,889 SGD

Retailer 2$13,070 SGD

Retailer 8$13,070 SGD

Retailer 9$13,968 SGD

Retailer 1$13,974 SGD

Retailer 11$14,160 SGD

Retailer 21$14,377 SGD

Retailer 17$14,396 SGD

Retailer 10$14,508 SGD

Retailer 5$14,571 SGD

Retailer 12$15,125 SGD

Retailer 13$15,580 SGD

Retailer 14$15,914 SGD

Retailer 16$16,157 SGD

Retailer 6$16,338 SGD

Retailer 19$18,830 SGD

Retailer 15$20,521 SGD

Retailer 3$21,784 SGD

30 data points across 21 retailers

33 retailers$11,436 SGD to $23,557 SGD

Cheapest Retailer

$11,436 SGD

$8,920 USD

B+

Retailer 2

$11,717 SGD

$9,139 USD

View

B+

Retailer 3

$11,898 SGD

$9,280 USD

View

B+

Retailer 4

$12,127 SGD

$9,459 USD

View

B+

Retailer 5

$12,458 SGD

$9,717 USD

View

B+

Retailer 6

$12,490 SGD

$9,742 USD

View

B+

Retailer 7

$12,889 SGD

CA$13,962 CAD

View

B+

Retailer 8

$12,924 SGD

$10,080 USD

View

B+

Retailer 9

$13,070 SGD

$10,194 USD

View

Final sale: no returns

B+

Retailer 10

$13,070 SGD

$10,194 USD

View

B+

Retailer 11

$13,942 SGD

$10,874 USD

View

B+

Retailer 12

$13,968 SGD

$10,895 USD

View

B+

Retailer 13

$13,974 SGD

£8,582 GBP

View

B+

Retailer 14

$14,160 SGD

$11,044 USD

View

B+

Retailer 15

$14,377 SGD

$11,214 USD

View

B+

Retailer 16

$14,396 SGD

A$17,274 AUD

View

B+

Retailer 17

$14,508 SGD

$11,316 USD

View

B+

Retailer 18

$14,509 SGD

$11,316 USD

View

B+

Retailer 19

$14,571 SGD

$11,365 USD

View

B+

Retailer 20

$14,604 SGD

$11,391 USD

View

B+

Retailer 21

$15,125 SGD

£9,289 GBP

View

Retailer 22

$15,308 SGD

$11,940 USD

View

Retailer 23

$15,308 SGD

$11,940 USD

View

Retailer 24

$15,578 SGD

$12,150 USD

View

Retailer 25

$15,580 SGD

$12,152 USD

View

Retailer 26

$15,808 SGD

$12,330 USD

View

Retailer 27

$15,914 SGD

$12,412 USD

View

Retailer 28

$16,157 SGD

€12,002 EUR

View

Retailer 29

$16,338 SGD

$12,743 USD

View

Retailer 30

$18,830 SGD

ZAR 237,269 ZAR

View

Retailer 31

$20,521 SGD

£12,603 GBP

View

Retailer 32

$21,784 SGD

$16,991 USD

View

Most Expensive

Diamond Quarter

1.5SI1D65439546KG · Oct 28

$23,557 SGD

£14,467 GBP

View

32 more retailers have this diamond

Prices start from $11,436 SGDSave up to $12,120 SGD

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.

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1.50ct Round

$11,436 SGD