Diamond pricing in Australia for 2025 reflects a volatile but buyer-friendly market—reacting to global oversupply, the rise of lab-grown stones, tightening regulations, and evolving consumer preferences. If you’re buying, selling, or simply curious, understanding the latest per-carat price trends is critical for informed decisions and smart shopping.
2025 Diamond Price Per Carat Breakdown
Natural Diamonds
- 0.5 carat: $1,220–$5,800
- 1.0 carat: $2,500–$18,000
- 1.5 carat: $3,300–$24,000
- 2.0 carat: $4,200–$29,000
- 3.0 carat: $7,200–$51,000
For 1-carat round brilliant diamonds, prices range dramatically (from $2,400 to $27,000) based on the Four Cs: cut, colour, clarity, and carat. The average price for a 1-carat diamond sits at about $6,296, though high-quality stones command up to $18,000 or more.
- Australian state averages for a 1-carat G-VS2 round solitaire in early 2025:
|
State/Territory |
Avg Price (AUD) |
|
NSW |
$13,850 |
|
VIC |
$13,200 |
|
QLD |
$14,100 |
|
WA |
$14,650 |
|
SA |
$13,980 |
|
TAS |
$12,700 |
|
ACT |
$13,500 |
|
NT |
$15,200 |
Lab-Grown Diamonds
Lab-grown diamonds offer dramatic savings—often 80–99% less than natural stones, especially as carat weight increases:
|
Carat |
Natural Price |
Lab-Grown Price |
|
0.5 |
$1,632 |
$295 |
|
1.0 |
$6,296 |
$422 |
|
2.0 |
$26,710 |
$929 |
|
3.0 |
$63,137 |
$1,456 |
Lab-grown discounts range from 80% for smaller stones up to nearly 99% for gems above 8 carats.
Market Trends and Forces Behind Pricing
- Global Oversupply: Diamond prices have hit record lows in 2025, dropping up to 40% from their 2022 highs. Oversupply, especially from lab-grown stones, is the biggest driver.
- Regulations: G7 bans on Russian diamonds have disconnected some supply routes, making large, high-quality stones scarcer and more expensive.
- Consumer Preferences: Millennials and Gen Z increasingly favour lab-grown diamonds for their ethical and environmental appeal, reducing demand for natural stones and pushing prices down further.
- Quality Factors: The Four Cs (cut, colour, clarity, carat) remain the decisive factor—superior cut and clarity can more than triple per-carat price, while lower grades bring entry prices below market averages.
Pricing Visualisation
|
Carat |
Natural Diamond Price |
Lab-Grown Diamond Price |
Lab-Grown Discount (%) |
|
0.5 |
$1,632 |
$295 |
81.91% |
|
1.0 |
$6,296 |
$422 |
93.29% |
|
2.0 |
$26,710 |
$929 |
96.52% |
|
3.0 |
$63,137 |
$1,456 |
97.69% |
Diamonds in Australia in 2025 have never been more accessible—if you know what to look for. Smart buyers and jewellers who stay on top of market trends, ethical options, and transparent pricing stand to benefit the most in today’s dynamic market.