Title
Crystal Cave: The Ultimate Geometric Coloring Book (Wooden Books)
Sold by Ergodebooks, an authorized reseller.
Returns accepted within 30 days | support@ergodebooks.com
Shipping Information
- Free Standard Shipping — United States only
- Processing Time: 1–3 business days
- Estimated Delivery: 3–5 business days after dispatch
- Double-boxed, fully insured & discreetly packaged
- Tracking number sent via email once dispatched
- Orders over $250 require signature upon delivery. Taxes calculated at checkout.
Returns & Refund
Returns accepted within 30 days of delivery.
Damaged or Defective Item
Free return shipping + replacement or full refund
Wrong Item Received
Free return shipping + replacement or full refund
Change of Mind
Return shipping at customer's expense · 25% restocking fee applies
Payment Option
Most of the 85 designs in Crystal Cave come from the famous Altair Design pattern books created decades ago, but to them have been added the extraordinary pentagonal patterns of the great mathematician Roger Penrose. Each design is based on meticulously created geometric patternsclosepacking circles repeating in square and hexagonal symmetriesthat are proven to stimulate the mind and creativity. Like cracks on a wall, they can conjure all sorts of images in the mind s eye, and because of their geometrical precision, any shape found can be found again and again, rotated, and reflected. The same design might be seen as a landscape by some, a flock of birds by others, or as abstract patterns, faces, wild animals, flowers, and many other things. They will provide hours of relaxation, mindful calm, and creative stimulationno other family of patterns offers more potential for enhancing your visual imagination.
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, please visit www.P65Warnings.ca.gov.