Why Old Gold Gets Brittle | Redesigning Jewelry in Calgary

By Ian Davidson, Designer & Goldsmith | Davidson Jewels

When people bring their grandmother’s old ring or a broken gold chain into our Calgary studio, they usually ask the same question: "Can you just melt this down and pour it into a new ring?"

It sounds like a simple idea. However, as an experienced designer and goldsmith, I have to tell them that simply melting old jewelry in a pot is actually a very bad idea. Doing this creates weak, brittle jewelry that could easily break or drop a precious diamond.

Here is the simple science behind why we don't just melt down your old gold, and how we safely redesign your family jewelry instead.

The Quick Answer: What happens if you melt down old gold jewelry?

Melting old jewelry mixes different metal alloys and old repair solders together. This mixing causes "metal fatigue," which creates tiny hidden air bubbles inside the gold called porosity. This makes the new ring brittle, weak, and completely unsafe for holding precious gemstones.

1. Gold is Almost Never 100% Pure

To understand why old gold gets brittle, we first need to understand how jewelry is made.

Pure gold (24-karat gold) is very soft—so soft that you can bend it with your fingers! To make a ring strong enough to wear every day, goldsmiths mix the pure gold with other metals like silver, copper, or zinc. This mixture is called an alloy.

For example, a 14-karat yellow gold ring is actually only about 58% pure gold. The rest is that mixture of other metals that gives it strength and color.

2. The Danger of the "Melting Pot"

Imagine baking a cake. You need an exact recipe of flour, sugar, and eggs. If you just throw in random leftovers from your fridge, the cake will be a disaster.

The same thing happens with gold. Over many decades, a family ring might be resized or repaired several times. Every time another jeweler worked on it, they likely used a slightly different type of gold alloy or a special metal glue called "solder" to put it back together.

If we take that ring, mix it with an old gold chain, and melt it all together in a hot pot, those different recipes clash. The metals do not mix smoothly.

3. What is Porosity?

When mismatched metals and old solders are melted together, the metal gets "fatigued" or tired. As it cools down, it traps tiny pockets of gas inside the gold.

This creates porosity, which means the gold is full of microscopic air bubbles. Under a microscope, the metal looks like a sponge or Swiss cheese.

Even if the ring looks shiny on the outside, those hidden bubbles make the gold extremely brittle. If you accidentally bump a porous ring against a doorframe, a piece of the metal could snap right off, and you could lose your family diamond forever.

4. The Davidson Jewels Solution: The Gold Credit

Because your jewelry needs to last a lifetime, we refuse to cast your new ring using weak, bubbly metal. But that doesn't mean your old gold is useless!

Instead of melting your jewelry directly at our workbench, we use a much smarter system:

1. We find the pure value: We look at your old jewelry and calculate exactly how much 100% pure gold is hiding inside the alloys.

2. We give you a credit: We give you a direct financial credit for that pure gold value, which lowers the cost of making your new custom ring.

3. We use fresh gold: We cast your brand-new design using fresh, structurally perfect gold that has the exact right "recipe" to hold your diamonds safely.

4. Your gold is recycled: Your old gold is sent to a professional refiner where it is chemically cleaned and purified back into 24-karat gold to be used again in the future.

By using our Gold Credit system, you get all the financial value out of your family heirlooms, plus the peace of mind knowing your new custom ring is built incredibly strong.

Want to learn more about how we transform old heirlooms into new masterpieces? Read our [Complete Guide to Redesigning Family Jewelry in Calgary]