For those of us designing jewellery, the journey doesn't end when the clasp is closed. The long-term beauty of a piece depends on understanding the character of the stones we choose—how they respond to wear, cleaning, moisture, and temperature. While we often talk about gemstone hardness, there are other factors—like porosity and hydration—that play a huge role in how a stone ages. Do you know, Ethiopian Opals can gain 5% weight if soaked in water.

In Australia, our jewellery has to work even harder. Between the beach air, the summer sun, and the backyard pool, gemstones face conditions that many traditional care guides never mention. One of my customers wore her Opals while surfing and they took a good while to dry out and for its fire to return — it still wasn’t the same.

Whether you’re working with a fresh strand from our Melbourne gemstone shop or repurposing an heirloom stone, a little care goes a long way.

In this guide:

What is Gemstone Stamina? (The Stamina & Care Scale)

Environmental Factors: Salt water, Chlorine, and the Australian Sun

Household Chemicals & Sanitisers: The Impact of Alcohol and Ammonia

Hardness vs. Integrity: Why "toughness" matters more than the Mohs Scale

Porosity & Hydration: The "Sponge Factor" in minerals

Thermal Shock: How temperature changes affect Emeralds

A Cleaning Routine That Works for Most Gemstones

What is "Gemstone Stamina"?

“Stamina” refers to how much handling, cleaning, or environmental exposure a stone can tolerate before its surface or structure is affected. Hardness is only one part of the story; two stones with the same Mohs scale rating can behave very differently in real-world Australian conditions.

Gemstone Cleaning & Stamina Summary

Gemstone Type	Stamina Level	Best Cleaning Method	Key Sensitivity
Quartz & Garnet	High	Lukewarm water + mild soap	Sudden temperature jumps.
Tourmaline	Medium	Damp microfibre cloth	Ultrasonic or Stream cleaners
Ruby & Sapphire	Medium–Low	Room-temp water + soft cloth	Pool chlorine & household acids
Emerald	Medium–Low	Room-temp water (briefly)	Intense heat & Detergents
Apatite	Low	Room-temp water (briefly) cloth	Chlorine, acids & heat
Lapis & Turquoise	Low	Dry or slightly damp cloth	Salt water & sun-cream
Opal & Pearl	Low	Soft, dry jewellery cloth	Chemicals, Salt & dehydration

Australian Factors Affecting Gemstone Durability

1. Gemstone Care at the Beach and Pool (Salt & Chlorine)

We love the water, but many gemstones don’t.

Salt Water: Porous stones like Turquoise, Opals and Lapis Lazuli can absorb salt. As the salt crystallises inside the stone, it can reduce lustre or create tiny internal stresses over time.

Chlorine: This is a strong oxidiser that can react with stones like Apatite.

Tip: After a day at the beach or pool, a quick rinse in fresh water helps remove residual salt or chlorine. However, prevention is better than cure.

2. The Harsh Australian Sun (UV Exposure)

UV exposure can affect the “complexion” of certain stones over time.

Fading: Amethyst, Rose Quartz, and other pale stones can lose saturation if left in direct sun for long periods.

Tip: If you’re storing beads or displaying jewellery in your studio, keep them away from strong, north-facing windows where UV is highest.

3. Hardness vs. Structural Integrity

The Mohs scale measures scratch resistance—not toughness.

Soft Stones: Opals are an Australian favourite, but they’re relatively soft. Over years of wear, the edges can show gentle rounding or surface wear if the setting places constant pressure on the stone.

Older Stones: Vintage or heirloom stones may have developed microscopic fatigue from decades of wear. Regardless of species, treat older stones as “low stamina.”

4. Porosity and Hydration

The Sponge Factor: Stones like Coral and Turquoise have microscopic structures that absorb liquids. In our climate, sun-cream and insect repellent are essentials—but their oils can seep into these stones and permanently alter their colour.

The Hydration Factor: Certain stones, such as Opals, contain a small amount of water. They generally prefer a stable environment and the natural moisture that comes from being worn occasionally.

Household Chemicals & Sanitisers: The Impact of Alcohol and Ammonia

Alcohol-based hand sanitisers and household cleaners containing ammonia can gradually damage porous and organic gems such as Pearls, Turquoise, and Coral. These materials are particularly vulnerable to surface dulling or erosion from repeated chemical exposure.

The Care Note: If you’re using heavy cleaning products or frequent hand sanitiser, it’s best to remove rings and bracelets.

Thermal Shock: How Temperature Changes Affect Emeralds

Even a sturdy stone can be sensitive to sudden temperature changes. Emeralds often have a natural internal “garden” of inclusions. Rapid temperature shifts can cause those inclusions to expand. Room‑temperature water is usually the safest path.

A Cleaning Routine That Works for Most Gemstones

For the majority of gemstone beads, a “less is more” approach works beautifully. The goal is to clean the surface, not to saturate the stone.

1. A Quick Dip, Not a Long Soak: A minute or two is usually enough to loosen surface grit. Porous stones can absorb excess moisture or soap if left soaking too long.
2. A Gentle Bath: Use lukewarm water with a tiny drop of pH-neutral dish soap to lift oils and residue.
3. A Soft Touch: A soft-bristled baby toothbrush helps clear debris from around drill holes—use light pressure.
4. The Rinse: Use a separate bowl of clean, room‑temperature water instead of a high‑pressure tap.
5. The Dry: Pat dry with a lint-free cloth and lay flat on a towel. Avoid hairdryers—sudden heat can cause thermal shock.
6. Ultrasonic Cleaners: Best avoided for most gemstone beads, as vibration can aggravate internal features.

Designing With Confidence

At Melbourne Gemstone Beads, we believe that understanding your materials is part of the artistry. When you know how a stone breathes, reacts, and ages, you design with intention—and your pieces last longer because of it.

We source quality beads and share the technical knowledge that helps you work and create timeless pieces with confidence. With our shared understanding, we can create jewellery that stands up to Australian conditions, respects the character of each mineral, and continues to look its best for years to come.