Can Rubies Go in an Ultrasonic Cleaner?

Rubies are the “King of Gemstones.” Known for their vibrant red hue and incredible durability, they are a favorite for engagement rings, heirlooms, and statement pieces. But when that signature glow starts to look a little dim due to lotion, oils, and everyday dust, you might wonder: Is it safe to put my ruby jewelry in a Creworks ultrasonic cleaner?

The answer is a cautious yes—but there are a few critical “checks” you need to perform before you press start.

Why Rubies are (Usually) Great Candidates

On the Mohs scale of mineral hardness, rubies rank at a 9. They are second only to diamonds. This means they are incredibly tough and can easily withstand the high-frequency “scrubbing” of an ultrasonic cleaner.

Unlike softer stones like opals or pearls, a natural, high-quality ruby won’t be scratched by the cavitation bubbles. However, the “toughness” of the stone is only part of the story.

The Three “Red Flags” to Check First

Before you drop your ruby ring into the basket, you must determine how the stone has been treated. Most rubies on the market today have undergone some form of enhancement.

1. Fracture-Filled Rubies (The Big “No”)

Many modern rubies have tiny surface-reaching cracks that are filled with lead glass to improve their clarity.

• The Risk: Ultrasonic vibrations can shake the glass filler loose or cause it to crack, ruining the appearance of the stone.
• The Rule: If your ruby is “glass-filled” or “composite,” do not use an ultrasonic cleaner. Stick to warm, soapy water and a very soft cloth.

2. Heat-Treated Rubies (The “Green Light”)

Almost all rubies are heat-treated to enhance their color. This is a permanent and stable treatment.

• The Verdict: Standard heat-treated rubies are perfectly safe in a Creworks ultrasonic cleaner.

3. The Setting and Accent Stones

A ruby ring is rarely just a ruby.

• Check the Accents: If your ruby is surrounded by “soft” stones like emeralds, tanzanite, or pearls, the machine could damage those secondary gems even if the ruby is fine.
• Check the Prongs: Ultrasonic cleaners are so good at their job that they can occasionally shake a stone loose if the metal prongs were already thin or damaged. Always inspect your jewelry for loose stones after a cleaning cycle.

How to Clean Rubies Like a Professional

If you’ve confirmed your ruby is natural or standard heat-treated, follow these steps for a showroom shine:

1. The Solution: Use lukewarm water and a few drops of mild dish soap. Avoid harsh chemicals or bleach, which can damage the gold or platinum setting.
2. The Temperature: Keep the water warm, but not boiling. Around 40°C to 50°C is perfect for breaking down body oils and hand lotion.
3. The Cycle: A short 3-minute cycle is usually all it takes.
4. The Rinse: After the cycle, rinse the piece in a bowl of clean water (don’t hold it over the open drain!) and pat dry with a lint-free cloth.

Can rubies go in an ultrasonic cleaner? * Yes: If they are natural, heat-treated, or lab-created.

• No: If they are fracture-filled, lead-glass filled, or if the jewelry contains other delicate side-stones like emeralds or pearls.

When in doubt, a quick trip to a local jeweler to identify your stone’s treatment can save you a lot of heartbreak. But for a high-quality, solid ruby, a Creworks Ultrasonic Cleaner is the best way to bring back that fiery red brilliance that made you fall in love with the stone in the first place.