Tanglewood Hollow
Flash Rocks
Flash rocks, also known as quartz, are piezoelectric rocks! They are one of the few minerals with properties that will create an electrical charge when subjected to mechanical stress.
Put a rock in each hand and forcefully rub the rocks together. To see the glowing electrical effect fully, you should do this in a darkened room. Please note: they do give off a distinctive odor from the friction. Do not hit the rocks together, just rub!
* Do not hold close to eyes while performing the experiment!
Pickup available at 93 Storrs Street
Usually ready in 4 hours
Product information
All orders are processed within 4 business days (excluding weekends and holidays) after receiving your order confirmation email. Orders are shipped from Concord, New Hampshire. You will receive an email notification when your order has shipped.
Please understand that holidays and periods of high traffic such as the Christmas season may cause delays in the shipping and delivery of orders.
Please also keep in mind that delivery timeframes are not guaranteed at this time by any carrier. Country-wide and regional delays should be expected with all carriers, so please place time-sensitive orders well in advance.
Time in transit is estimated from the day that the package is delivered to the carrier.
Domestic Shipping Rates
Shipping charges for your order will be calculated based on weight and will be displayed at checkout. Orders will be shipped via USPS First Class, USPS Priority Mail, or UPS Ground.
We do not provide estimated delivery timeframes for Armed Forces addresses. Please plan on at least several weeks for delivery.
International Shipping
We unfortunately no longer offer international shipping in the wake of international shipping policies and standards changing in ways that our company is unable to uphold. Thank you for understanding.