Yooperlite Raw Stones: comparison of raw stones glowing under UV light vs gray in natural light
Yooperlite Raw Stones: UV365 flashlight lighting up rough stones with glowing orange veins
Yooperlite Raw Stones: pile of rough stones glowing orange under a UV lamp outdoors
Yooperlite Raw Stones: UV flashlight revealing an orange glow on a gray rough stone
Yooperlite Raw Stones: group of rough gray stones with glowing orange spots under UV
Yooperlite Raw Stones: hand holding rough stones glowing orange, with a ruler for scale
Yooperlite Raw Stones: five rough gray speckled stones in natural light on a white background

Yooperlite Raw Stones

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Size chart

Use this reference guide to convert between centimeters, millimeters, and inches when shopping for crystals. All Crystal Destiny product listings show measurements in millimeters (mm).

Crystal size reference chart

CM to MM to Inches Conversion Chart

Centimeters (cm) Millimeters (mm) Inches (in)
0.5 cm 5 mm 0.2 in
1 cm 10 mm 0.39 in
1.5 cm 15 mm 0.59 in
2 cm 20 mm 0.79 in
2.5 cm 25 mm 0.98 in
3 cm 30 mm 1.18 in
3.5 cm 35 mm 1.38 in
4 cm 40 mm 1.57 in
4.5 cm 45 mm 1.77 in
5 cm 50 mm 1.97 in
5.5 cm 55 mm 2.17 in
6 cm 60 mm 2.36 in
6.5 cm 65 mm 2.56 in
7 cm 70 mm 2.76 in
7.5 cm 75 mm 2.95 in
8 cm 80 mm 3.15 in
8.5 cm 85 mm 3.35 in
9 cm 90 mm 3.54 in
9.5 cm 95 mm 3.74 in
10 cm 100 mm 3.94 in
11 cm 110 mm 4.33 in
12 cm 120 mm 4.72 in
13 cm 130 mm 5.12 in
14 cm 140 mm 5.51 in
15 cm 150 mm 5.91 in
16 cm 160 mm 6.30 in
17 cm 170 mm 6.69 in
18 cm 180 mm 7.09 in
19 cm 190 mm 7.48 in
20 cm 200 mm 7.87 in
25 cm 250 mm 9.84 in
30 cm 300 mm 11.81 in

Quick Reference

  • 1 cm = 10 mm = 0.394 inches
  • 1 inch = 25.4 mm = 2.54 cm
  • 1 mm = 0.1 cm = 0.039 inches

All Crystal Destiny product measurements are listed in millimeters (mm). Use this chart to convert to your preferred unit of measurement.

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These raw yooperlite stones are natural rough chunks of speckled gray rock that look ordinary in daylight. Shine a UV flashlight on them and bright orange and yellow spots blaze to life, as if the stones hold tiny embers. Each piece is about 20-40mm, easy to hold and fun to explore. They are perfect for collectors, classrooms, kids and anyone who loves a little everyday magic.

Product Highlights

  • Material: Natural raw yooperlite (syenite with fluorescent sodalite)
  • Weight options: 50g or 100g
  • Size: Pieces about 20-40mm each
  • Form: Raw, unpolished rough stones, from our raw crystals collection
  • UV reaction: Glows orange under longwave UV light (flashlight not included); see our UV reactive crystals
  • What you receive: Yooperlite pieces totaling the weight you choose
  • Selection: Random Pick: chosen from current stock to match your weight

Chakra Connection

In crystal tradition, yooperlite is linked to the Sacral Chakra and the Solar Plexus Chakra, where its hidden inner fire is tied to creativity, motivation and confidence. Many people see it as a symbol of the light we carry inside, even when it is not visible to others. Raw stones carry the meaning of authentic, unpolished potential, the idea that something remarkable can hide inside the most ordinary-looking rock. Explore more stones like it in our Confidence and Courage and Creativity and Inspiration collections.

How to Use

  • Hide pieces around the room and hunt for them with a UV flashlight, a hit with kids.
  • Fill a small glass dish and use it as a glowing night display.
  • Pair them with fluorescent calcite for a UV glow collection; see our calcite collection.
  • Use them in science lessons about minerals and fluorescence.
  • Give them to young rock hounds or curious friends; they make a fun stocking stuffer or birthday gift.

Crystal Care

Yooperlite is a fairly durable stone, around 5.5 to 6 on the Mohs scale, but edges can chip if dropped. Dust it with a soft cloth, or rinse it briefly in lukewarm water and dry it right away. Avoid harsh cleaners. Shine a longwave UV flashlight on it in a dark room to see the glow, and see Why Do Crystals Glow? to learn how it works.

FAQs

Does it really glow?

Yes. The sodalite in yooperlite fluoresces orange to yellow under longwave UV light, usually around 365nm. In normal light it looks speckled gray. A UV flashlight is not included.

Is it natural yooperlite?

Yes. It is natural syenite with fluorescent sodalite. The glow is a natural mineral property, not paint or a coating.

How big are the pieces?

Each piece is about 20-40mm. The 50g and 100g options include several pieces of mixed size and shape.

Is a flashlight included?

No. A longwave UV flashlight around 365nm is needed to see the glow and is sold separately.

Are they good for kids?

Yes, with supervision. Kids love discovering the glow. Keep small stones away from very young children.

What Is Yooperlite?

Yooperlite is the trade name for a gray syenite rock rich in fluorescent sodalite. It became famous after glowing stones were found on the Lake Superior shoreline of Michigan in 2017, and similar material, often called flame stone, is now also mined elsewhere and cut into carvings and shapes. In daylight it looks like speckled gray granite. Under longwave UV light, the sodalite lights up in bright orange and yellow, which is the easiest way to tell it apart from ordinary gray stone. Raw pieces show the natural rock just as it is found, which is why many collectors start with rough stones. Discover more in our yooperlite collection.

Further Reading

Discover the hidden fire inside these raw stones and share the glow with someone curious.

Metaphysical properties are shared for spiritual and traditional interest only and are not medical advice. Our products are not intended to diagnose, treat, cure or prevent any condition.

  • Free shipping on orders over $100.00 within the contiguous United States.
  • Shipping times may vary depending on the product
  • We strive to process and ship orders within 1-2 business days
  • Estimated delivery time is typically 12-16 days, though it may vary based on the destination
  • We appreciate your patience and understanding as we work diligently to deliver your order promptly and securely.
  • For any further assistance or inquiries regarding shipping, please feel free to reach out our customer support team.

Each crystal is natural and unique, with no two crystals being identical. Some crystal may contain naturally formed cracks within itself, not caused by other objects.

Please note that size, color, and patterns may vary due to the different batches of crystals and its natural inclusions, or hand measurements.

You can always reference the Size Chart on every product page to translate grams to pounds and ounces, and, millimeters and centimeters to inches.

Thank you for understanding and enjoying all the wonders of crystals.

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