Skip to product information
1 of 5


Crushed Black Tourmaline from Brazil, Coarse Crush, Gravel Size, 4mm - 2mm

Crushed Black Tourmaline from Brazil, Coarse Crush, Gravel Size, 4mm - 2mm

Regular price $7.00 USD
Regular price Sale price $7.00 USD
Sale Sold out

Tourmaline represents a large group of related mineral species that exhibit many unusual optical and physical properties. Chemically more complex than most minerals, tourmaline exhibits a substantial range of colors and varieties. This particular black tourmaline is from Brazil and has a nice shiny appearance even when crushed. Tourmaline is also one of the official birthstones for October.

Our coarse material is considered to be pea-sized gravel, ranging between 4 millimeters to 2 millimeters. Please see the corresponding sediment size chart. 

Mineral Properties

  • Mohs’s Hardness: 7 - 7.5
  • Specific Gravity (g/cm3): 3.00 - 3.26
  • Luster: Vitreous
  • Color: Black
  • Origin: Brazil

This product is not man-made, mixed with resin, dyed, or stabilized. Pictures are taken in full sun and material is dry. Size measurements are using the metric system (millimeters), including the metric ruler (cm/mm) as shown in the product photos.

  • Free Domestic Shipping $50+
  • Fast and Easy Returns
  • Happiness Guaranteed
View full details
  • Shipping

    We offer free US shipping on any order over $50. Orders are typically shipped within one to two business days and spend 2-5 days in transit. This means your order should arrive at your doorstep within 4-6 business days -- and often less!

  • Returns

    We offer a hassle-free 30-day return policy. If you wish to return or exchange any product in your order, simply email, and we will help you process the request.


Begin a new daily practice with quality supplies that nourish your desire to create.