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Round|Natural|GIA

1.50ct G SI1 Round Natural Diamond

VG • G/SI1 • GIA 2131663925

Certificate GIA 2131663925

Diamond specifications and retailer prices

From $16,900 AUD
$11,871 USD
As of October 31, 2026
Save $13,292 AUD (44%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $34,024 AUD 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 2131663925. Listed at 23 retailers as of October 31, 2026, with a 79% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.50
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2131663925
Dimensions7.30 × 7.24 × 4.54 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.30 mm7.24 mm1.50 ctG / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2131663925
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.4%

Caratlytics Score

How it works →
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: Oct 31
Current: $30,191 AUD|Low: $16,109 AUD|High: $30,555 AUD|Avg: $21,953 AUD|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 10$16,900 AUD
Retailer 7$17,026 AUD
Retailer 8$18,527 AUD
Retailer 4$20,326 AUD
Retailer 9$20,621 AUD
Retailer 6$20,770 AUD
Retailer 2$21,748 AUD
Retailer 3$23,280 AUD
Retailer 5$28,401 AUD
Retailer 1$30,191 AUD

44 data points across 10 retailers

23 retailers$16,900 AUD to $30,191 AUD

B
Cheapest Retailer
-
$16,900 AUD
$11,871 USD
B
Retailer 2
-
$17,026 AUD
$11,960 USD
View
B
Retailer 3
-
$17,665 AUD
$12,409 USD
View
B
Retailer 4
-
$17,936 AUD
$12,599 USD
View
B
Retailer 5
-
$18,082 AUD
CA$17,641 CAD
View
B
Retailer 6
-
$18,527 AUD
$13,014 USD
View
Final sale: no returns
B
Retailer 7
-
$18,991 AUD
$13,340 USD
View
B
Retailer 8
-
$19,332 AUD
$13,580 USD
View
B
Retailer 9
-
$19,670 AUD
$13,817 USD
View
B
Retailer 10
-
$20,326 AUD
£11,242 GBP
View
B
Retailer 11
-
$20,621 AUD
$14,485 USD
View
Retailer 12
-
$20,770 AUD
View
Price last confirmed 8 days ago
B
Retailer 13
-
$20,943 AUD
$14,711 USD
View
B
Retailer 14
-
$21,748 AUD
$15,277 USD
View
B
Retailer 15
-
$22,023 AUD
$15,470 USD
View
B
Retailer 16
-
$22,023 AUD
$15,470 USD
View
B
Retailer 17
-
$22,423 AUD
$15,751 USD
View
B
Retailer 18
-
$22,763 AUD
$15,990 USD
View
B
Retailer 19
-
$23,280 AUD
€15,574 EUR
View
B
Retailer 20
-
$27,387 AUD
$19,238 USD
View
B
Retailer 21
-
$28,401 AUD
ZAR 322,298 ZAR
View
B
Retailer 22
-
$30,191 AUD
£16,699 GBP
View
Most Expensive
Diamond Quarter
1.5SI1G21257AF0N · Oct 29
$34,024 AUD
£18,819 GBP
View
Price under review
22 more retailers have this diamond
Prices start from $16,900 AUDSave up to $13,292 AUD

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
1.50ct Round
$16,900 AUD