Not your region? Change it here:

Your region:
CREMER Erzkontor Logo

Raw materials for your needs

Forged Steel Balls

Cinderballs are small, spherical rock fragments that are often found near volcanoes or lava flows. These rock balls are formed when molten rock (lava) solidifies in air or water, forming spherical structures. They are usually hollow or have cavities inside, created by rising gases during the cooling and solidification of the lava.


Your regional sales manager

Oliver Bonk

Sales Manager


Cinderballs, also known as slag balls, are often used as a cost-effective filler material in construction and landscaping applications, particularly in drainage projects and as a lightweight aggregate in concrete mixes to reduce overall weight. Their porous structure allows for improved water retention and aeration in soils.

Processing and Services

We offer a range of services and processing options for your material.