Tyler Brooks
Crystals are often added to candles to enhance their appearance and introduce the healing properties of the stone. However, adding crystals to candles can be dangerous and may introduce significant safety hazards. Some crystals are sensitive to heat and can crack, explode, or release harmful substances. For example, malachite releases toxic fumes when heated, and selenite can dissolve or become damaged when exposed to water. Therefore, it is important to choose crystals that are heat-resistant and place them away from the direct flame to prevent them from overheating.
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What You'll Learn
Crystals with internal fractures or existing damage
To avoid this, it is important to inspect any crystals you plan to use in candles for any signs of internal fractures or existing damage. If there are any flaws, it is best to choose a different crystal.
It is also important to consider the type of crystal you are using. Some crystals, such as quartz, are thermodynamically stable and less likely to explode. Others, such as amethyst, may lose their colour when exposed to high temperatures.
Overall, it is important to use caution when adding crystals to candles. While most crystals are safe to use, those with internal fractures or existing damage should be avoided to prevent damage or injury.
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Crystals that lose their colour at high temperatures
While most crystals are safe to be used in candles, some crystals, such as amethyst, lose their colour when exposed to very high temperatures. This does not apply to the heat coming from a candle wick. Raw crystal pieces, tumbled stones, chips, hearts, and spheres can all be used in candles. However, it is important to know how to combine them, depending on their purpose. Additionally, when used together with essential oils and healing herbs, the benefits of such crystal-infused candles are increased considerably.
Some crystals are known for changing colour, like amethyst and turquoise. Many coloured crystals fade in direct sunlight and gradually over time from indirect light. This is why it is not recommended to cleanse crystals in sunlight or place coloured crystals in a sunny window. When crystals are exposed to contrasting hot and cold temperatures (heating then cooling), they are more vulnerable to cracks, flaws, or sudden breaking. This might be caused by placing crystals near a radiator, heater, AC unit, window, or in a hot bath. Raw, unpolished crystals are more vulnerable to these temperature changes.
Some crystals, such as smoky quartz, will lose their colour and turn grey or brown. Super Seven and Topaz will also fade in colour. A yellow topaz will turn brown, and a deeper-coloured topaz will turn maroon. Turquoise will also fade in the sun and should be kept away from water. Unakite will also lose its colour in the sun. Crystals with faceted points in clusters can heat up and ignite a fire. Some crystals will become brittle, crack, or break when left in the sun for too long.
It is important to note that crystals with low thermal conductivity and a low heat of expansion are better suited for use in candles, as they will not get as hot. The size of the crystal, the diameter of the candle, and the placement of the crystal all play a role in determining the temperature the crystal will reach.
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Crystals that are painted
While there is limited information on painted crystals, there is a discussion on Reddit about painting fake quartz crystals with ink or dye. The crystals are glued in place, brushed with ink, and then flocked around to cover any ink in places where it is not wanted. The user recommends using a clear coat over the ink to prevent it from rubbing off. Another user suggests using miniature paints such as Citadel contrast and Army Painter speed paints. A third user recommends using airbrushes with speedpaints and inks.
In terms of crystals that cannot be used in candles, some crystals, such as amethyst, lose their colour when exposed to very high temperatures. Some crystals may also release toxins when heated or explode, causing the candle vessel to break. However, some sources claim that most crystals are safe to use in candles, and that crystals with low thermal conductivity and a low heat of expansion are ideal.
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Crystals with a low heat of expansion
When making candles with crystals, it is important to consider the thermal properties of the crystals. Some crystals can release toxins when heated, while others may explode due to uneven heat distribution. To avoid these issues, it is recommended to use crystals with low thermal conductivity and a low heat of expansion.
The heat of expansion, or thermal expansion, refers to how the size of an object changes with temperature. It is influenced by factors such as crystal symmetry, bond energy, and pressure. Materials with a high melting point tend to have lower thermal expansion. Additionally, materials with monoclinic or triclinic crystal symmetry exhibit greater changes in the angles between axes when subjected to thermal variations.
While most crystals are considered safe for use in candles, it is important to choose crystals that are less likely to explode or release toxins when heated. Clear quartz, for example, is thermodynamically stable and has a low thermal conductivity and heat of expansion. Other crystals commonly used in candles include rose quartz, citrine, amethyst, selenite, jade, and red jasper. These crystals are believed to offer various benefits, such as promoting peace, aiding sleep, and providing emotional healing.
It is worth noting that some crystals, like amethyst, may lose their color when exposed to very high temperatures. However, this color change is typically not observed at the temperatures reached by candlewicks. Additionally, the size and placement of the crystals within the candle can impact their heat exposure.
In summary, when creating crystal candles, it is crucial to select crystals with low thermal conductivity and a low heat of expansion to minimize the risk of explosion and toxin release. Proper placement of the crystals and an understanding of their thermal properties are essential for crafting safe and enjoyable crystal candles.
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Crystals that are irregularly-shaped
Crystals with irregular shapes are not recommended for use in candles. Irregularly-shaped crystals introduce problems with testing, as it is difficult to determine whether they are safe to expose to an open flame for extended periods. Even if a crystal is determined to be safe, purchasing a large, high-quality crystal without impurities can be prohibitively expensive for most crafters.
Additionally, some crystals can release toxins when heated, while others may explode or cause the candle vessel to break due to uneven heat distribution. This can create safety hazards, such as releasing toxic fumes or sending hot wax and sharp crystal shards flying. To avoid these issues, it is recommended to keep crystals and herbs away from the direct flame of the burning wick.
However, some sources claim that certain crystals are suitable for use in candles, such as hematite, rose quartz, clear quartz, peacock ore, and garnet, as they are less likely to discolour or crack. These crystals are often used in candle-making and are known for their energetic and healing properties.
When creating crystal candles, it is important to use heat-safe vessels and wicks, and to place the crystals away from the direct flame. Wide vessels are preferable as they allow for better heat distribution and help maintain the shape of the candle.
While some companies sell candles with crystals inside, it is important to follow safety instructions and keep candles with crystals unattended. Overall, while crystal candles can be aesthetically pleasing and hold spiritual significance for some, it is crucial to be aware of the potential risks associated with using irregularly-shaped crystals.
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Frequently asked questions
Yes, crystals with internal fractures or existing damage are susceptible to further damage when heated. Water-soluble stones such as Selenite, Lepidolite, and Angelite, and flaky/layered stones like Malachite, Pyrite, and Fluorite should be avoided as they can crack, explode, or release harmful substances.
It is advised not to use imitation crystals in candles as they may contain toxic substances that can be released when heated.
Dried flowers, herbs, and essential oils are safe alternatives to crystals in candles and can even enhance their benefits.
Yes, crystals such as Clear Quartz, Rose Quartz, Amethyst, Smoky Quartz, Citrine, and Obsidian are generally considered safe to use in candles and offer various energetic benefits.
To ensure safety, choose crystals that can withstand heat without cracking or exploding. Place the crystals at the top of the candle so they don't get too hot, and use larger crystals to prevent them from sinking too close to the flame.
