Lavarock.biz Offers a Variety of Sizes For Your Lava Rock Project Needs!

    Black Lava Rock

    Fire Rocks Represents one of the last working black/red lava rock mines still and producing. Due in part to many new rules and regulations issued by MSHA and EPA as well as other Federal government agencies: BLM, etc.
    Our black lava rock varies in color from very black-black, to green-black, blue-black, even a gold-black color. These colors can be seen reflected in the lava rock when viewed outside on a sunny day. You will also notice the popcorn-like nature of this lava rock. Meaning it is light and airy, many holes and cavities in every piece. Making this material very different from other lava rock that is out there.

    What is Volcanic Glass ?

    Our definition of volcanic glass, is what is called, foamed obsidian. Obsidian is a dense volcanic glass that was formed when newly formed red hot lava is cooled down, super quickly. There is/was no time for air/gas bubbles to form in the lava. You may have seen native American projectile points (arrow heads) that were made of this material. They are usually found in the western states of Utah and the states that surround Utah.
    Obsidian, when worked properly, is very sharp and cuts cleanly, more so than the sharpest metal knives we have today. Our lava rock is what is called foamed obsidian. This is still a form of volcanic glass, but it is light weight and much less dense, easily crushable and has many gaseous bubbles that are contained within it. Although it is possible to cut yourself on its edges, the likely hood of that happening are slim to none, because of the fragile nature of the foamed obsidian lava rock.

    There are Two Ways to Purshase Smaller Amounts of Black Lava Rock

    These boxes average 514 to 546 cu inches of black lava rock product depending on the current box we have in stock. These boxes are for small quantities and arrive in 2 to 3 days shipping.

    Larger quantities will be shipped UPS ground as you will get more black lava rock for your money.

    Be sure to choose the appropriate add to cart button for your quantity ordered.

    Notice: Due to shipping cost, your freight will be more than the cost of the Lava Rock Material.

    Interested in Purchaseing Black Lava Rock by the Truck load? Click Here



    Black Lava Rock 1 & 1/2 inch size

    image of lava rocks's black 1 1/2 inch lava rock

    This material is the largest of our screened Black lava rock. This size is perfect for fish aquariums, Rock Gardens, Accents in grow boxes. Gas BBQ Grills, Fire Pits, Gas Fireplaces, Fish pond bio-filters and for many other uses.

    Black 1 1/2 inch
    Medium Sized USPS Flat Rate Box,
    appox. 1/3 cubic foot
    appox. 10 lbs.

    Black 1 1/2 inch
    Large Sized USPS Flat Rate Box,
    appox. 1/2 cubic foot
    appox. 15 lbs.

    Black Lava Rock, 1 inch size

    This size is great for Fish Aquariums, Rock Gardens, drainage in grow boxes, soil conditioner, Gas Fireplaces, Firepits.

    Black 1 inch
    Medium Sized USPS Flat Rate Box,
    appox. 1/3 cubic foot
    appox. 10 lbs.

    Black 1 inch
    Large Sized USPS Flat Rate Box,
    appox. 1/2 cubic foot
    appox. 15 lbs.

    Black Lava Rock 1/2 inch

    1/2 Inch black lava rock is popular in walk ways and garden paths. Can be used for increased drainage in potted plants. Some people call this black lava rock mulch or top dressing mulch. Looks graint in Gas Fireplaces and Gas Firepits. 1/2 inch inch Black Lava Rock

    Black 1/2 inch
    Medium Sized USPS Flat Rate Box,
    appox. 1/3 cubic foot
    appox. 11 lbs.

    Black 1/2 inch
    Large Sized USPS Flat Rate Box,
    appox. 1/2 cubic foot
    appox. 15 lbs.

    Black Lava Rock 3/8 minus inch

    This includes everything from 3/8 inch sized lava rocks, down to very fine black lava rock granules.
    This size of lava rock is very popular for de-slicking grit; which is used on driveways, walk-ways or porches where ice can build up in the winter time. Its black color aids it warming and drying out the area by absorbing the suns energy melting the ice. If the sun doesn't come up for a while then the black de-slicking grit makes for great foot traffic traction. Using this for ice melt, doesn't harm the grass or plant life either, using salt will kill or damage plant life.
    Many people like this size for use as soil conditioner in potting soil for indoor plants such as Bonsai trees and orchids.

    Black 3/8 minus inch
    Medium Sized USPS Flat Rate Box,
    appox. 1/3 cubic foot
    appox. 21 lbs.

    Black 3/8 minus inch
    Large Sized USPS Flat Rate Box,
    appox. 1/2 cubic foot
    appox. 27 lbs.