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First class light pumice stones and lightweight red and black lava stones. Directly from Anatolia.

  • Pumice and lava stones are, volcanic rock glass, and from the chemical composition, which can be acidic or basic, very similar in structure. The light pumice, due to the higher number of pores, is lighter than lava rocks. 

  • Pumice porous - up to 85% -, has a low dry bulk density, which in ours, is between 350-500 kg/m³, and therefore can float on water.

  • Our pumice has a high degree of whiteness, and here the higher the pore content and the smaller the bubble size, the lighter the pumice. However, the white color, with time, through weathering, can change to gray-brownish. However, the white color, with time, through weathering, may change to gray-brownish; in addition, brown or black lava rocks tend to be heavier than pumice.

  • Our pumice comes from the area around Kayseri, while the lava stones come from southern Anatolia.

Black Lava
Red brown lava
Black Lava - stockpile
Pumice 8-16mm
Pumice: 8-16mm
Pumice quarry

  • Since the 18th century, the so-called Engers sandstone has been quarried in the Neuwied Basin. Meanwhile the pumice from this only pumice region in Germany is running out. In cooperation with the old-established company AG-Stein from Neuwied, we now offer pumice and lava from Turkey. 

  • Our pumice or pumice gravel, originating from Central Anatolia, is largely free of foreign matter and clay content, so that it is, even in its natural state, equal to the washed pumice of most competitors.  In practice, this results in high cost advantages, since the cost- and time-intensive washing process can be omitted. In addition, the moisture content of natural pumice is considerably lower than that of washed pumice, which is normally traded moist. The dry bulk density is between 350-550 kg/m³, depending on the fraction. 

  • The bulk weights of our lava stones are particularly low. They vary between 550 and 850 kg/m³. Reddish-brown and black lava stones are used in road construction and horticulture, as well as a carrier material in the composition of various plant substrates and cactus soils.

  • Extraordinary are our deep black lava stones, which are rare in Europe.

  • Lava mulch is more pressure-resistant than classic pumice and thus more effectively prevents compaction of the soil, reduces evaporation of water from the upper soil layers and is thus a good alternative to bark mulch.

Other countries also have beautifully light stones.
Our pumice comes from Central Anatolia.
The lava stones from Southern Anatolia.

Anker 1


  • Basic material for planting substrates

  • Green roof

  • Agricultural pumice

  • lightweight concrete aggregate and for brick production

  • Road construction

  • underlayment, facade, flat roof, cavity insulation

  • Thermal insulation for facades

  • Filter medium

  • Oil binder

  • Filler (for medical and cosmetic applications and in plastics production)

  • Garden and soil construction

  • Cement, building materials and construction industry

  • Chemical industry

  • Filler for plastics, paper, paints and varnishes

  • Non combustible

  • Heat and cold insulating

  • Low dead weight, low bulk density

  • Pressure resistant, weathering resistant

  • Frost and heat resistant

  • Innert and odorless

  • Non-toxic (for food industry e.g. as filter medium for water treatment)

  • High absorbency (also suitable for binding hazardous materials)

  • Ecological. Pumice can be recycled or disposed of without any problems

Pumice Chemical parameters (average values)   


SiO2                52-60 %

AlO2                20-25 % 

Na2O              7,0-8,0 %

Fe2O3             1,5-2,5 %

K2O                5,0-6,0 %

TiO2                    0,5  %

CaO              0,0-2,5  %

Mol. Water        ≤ 2%

   Characteristics                    Units/Remark

  • Pumice, bulk density (naturally moist): approx. 540-800 kg/m³.

  • Pumice, bulk density (dry):        approx. 350-550 kg/m³

  • Pumice color: white, gray

  • Lava, bulk density (naturally moist): approx. 600-800 kg/m³

  • Lava, bulk density (dry):             approx. 550-800 kg/m³

  • Lava color:                                  brown, black

  • Thermal conductivity:                 0.12 W/mK- 0.18 W/mK

  • MOHS hardness:                        approx. 4.5

  • Melting point:                              approx. 1100 °C

  • Standard grain sizes:                 0-36 mm in gradations

  • Special grains:                           on request

  • Packaging:                                 Big bag, bulk material

  • EC No.:                                       215-108-5

  • Reach:            no registration obligation; acc. to EC No. 1907/2006

  • CAS No.:                                     332-09-8

  • Hazardous material:                    No

All information provided here is for general and non-binding information only, without any claim to correctness and completeness and without warranty. Furthermore, they do not represent any general assurance of product properties.

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