When choosing a precious metal for a custom-made ring, the two most popular options are 18-carat gold andWhen choosing a precious metal for a custom-made ring, the two most popular options are 18-carat gold and platinum. Both metals are prized for their beauty, durability, and prestige, but they differ significantly in terms of cost, weight, and long-term maintenance. Whether you’re designing a bespoke engagement ring, a wedding band, or a statement piece, understanding the key differences between 18K gold and platinum will help you make an informed decision.
Material Comparison: 18K Gold vs. Platinum
1. Purity and Composition
- 18K Gold is made up of 75% pure gold and 25% alloy metals (such as copper, silver, or palladium), which influence its colour and strength. It is available in yellow, white, or rose tones.
- Platinum is typically 95% pure, making it denser and more hypoallergenic than gold. It retains its naturally white colour over time without the need for rhodium plating.
2. Weight
- Platinum is approximately 60% heavier than gold. For example, a ring that weighs 5 grams in 18K gold would weigh about 8 grams if made in platinum. This weight difference gives platinum rings a more substantial feel but also impacts the price.
Cost Breakdown: Gold vs. Platinum Ring
Example: Classic Solitaire Ring Design
| Feature | 18K Gold (5g) | Platinum (8g) |
|---|---|---|
| Metal Cost per Gram | AUD $123-145 | AUD $73 -85 |
| Total Metal Cost | AUD $615–725 | AUD $584–680 |
| Crafting Charges | AUD $300–500 | AUD $400–600 |
| Total Estimated Cost | AUD $915–1125 | AUD $984–1280 |
Note: These figures are approximations and vary based on ring design complexity, jeweller’s rates, and daily bullion prices.
Why Choose 18K Gold?
- Affordable luxury: Gold offers the prestige of a precious metal at a more accessible price.
- Colour variety: Choose from yellow, white, or rose tones to suit your personal style.
- Classic and timeless: 18K is the standard for luxury jewellery, combining durability with rich colour.
Why Choose Platinum?
- Exceptional durability: Platinum is more resistant to wear and ideal for heirloom pieces.
- Hypoallergenic: A top choice for sensitive skin.
- Low-maintenance: Maintains its natural white lustre without plating.
Choosing between 18K gold and platinum comes down to your budget, lifestyle, and personal preferences. If you’re looking for a lighter, more affordable option with colour flexibility, 18K gold is a great choice. If you value longevity, weight, and purity, platinum may be worth the higher investment.
Either way, a well-crafted ring in either metal will provide a lifetime of beauty and meaning. Always consult with a reputable jeweller to discuss your design and get an accurate quote based on current metal prices.