As a wholesale supplier to jewelers and other industry professionals, Rio Grande wants to avoid presenting wholesale pricing to retail consumers. In addition, the U.S. Patriot Act requires all suppliers of precious metals to maintain full contact information for all of its customers.
Please be aware that we vigilantly protect your account information—it will never be shared or sold to any third party for any reason, ever.
The benefits of having a dedicated account with us include:
See current pricing on all products based on published daily metal markets.
Access and print your order history and invoices any time you need them.
Create and update a 'wish' list of products you have selected but are not yet ready to purchase.
Manage and update your account information, including contact and payment information, at your convenience.
For security reasons, the first time you log in to Rio’s new site, you are required to set your password. We have sent you an email with instructions on how to reset your password.
Change Your Password
Silver Hardness Chart
Heat-Hardening Sterling Silver
To harden sterling silver, heat it to 600°F (316°C) for 30–50 minutes in a kiln or furnace. Air-cool the sterling silver before pickling. The hardness will be equal to the hardness achieved by cold-working it to a 50% reduction (or ¾-hard). If you want to make your sterling silver harder than ¾-hard, you must physically reduce the cross-sectional area using the chart below.
Reduction in Cross-Sectional Area
Example: If you start with a dead-soft wire and reduce the cross-sectional area by drawing it down 50%, your material will become ¾-hard.