Red volcanic lapilli, volcanic lava 50/100 mm (n 1 aquarium pebble)

RED VOLCANIC LAPILLUS, VOLCANIC LAVA 50/100 mm (n° 1 pebble for aquariums).

The listing refers to the purchase of a single pebble with a diameter between 100 and 200 mm.

Pumice and lapilli are the product of explosive volcanic eruptions formed following a violent expansion of gases dissolved in lavas of acidic chemical composition: the rapid cooling of the rock prevented its crystallization, trapping the gases inside and generating alveolar minerals that expanded to a more or less accentuated extent.

In fact, during the solidification phase, the vapours present in the magma, suddenly released, caused the swelling of the entire mass of the magma and it is during this rapid cooling phase that the differences in the physical structure of the various volcanic aggregates were determined: the volcanic lapilli was formed starting from a magma with a lower silica content.

The lower viscosity and slower cooling of the lava facilitated the escape of a certain quantity of the gases present in the magma.

Minerals were formed that were characterized by voids of a larger average diameter than those of pumice but in a decidedly smaller number.

CHEMICAL ANALYSIS AVERAGE

SiO ₂ : 56%

At ₂ O ₃ : 16.5%

₂ O: 4.9%

Fe ₂ O ₃ : 6.5%

CaO: 8.8%

_Na2O : 0.8%

TiO ₂ : 3.1%

MgO: 1.2%

TECHNICAL FEATURES

pH: 7.0;

CATION EXCHANGE: 18 meq/100g.

FUNCTIONAL CHARACTERISTICS AND FIELDS OF USE

Lightweight natural inert, ideal for:

? rooting substrate (sowing, cuttings, transplants, soil-less cultivation and hydroculture);

? preparation of universal soils;

? preparation of specific soils (annual plants, acidophilic plants, succulent plants, houseplants, lawns, etc.);

? preparation of professional soils for outdoor horticultural and floricultural nurseries and for protected crops;

? mulch flowerbeds or areas of the garden where you want to avoid the growth of grasses or weeds;

? hydroponic crops;

? soil amendment;

? hydroponics;

? drainage;

? support surface for vases;

? thermal insulation.

NB: COLOR NEWS

Please note that the color of the material is variable. It depends on many factors including: the extraction point in the quarry and the humidity contained. The color varies from light red-purple (when the product is completely dry) to intense red-brown (when the product is humid or wet). It is not possible, in any way, to choose between these colors that are found indiscriminately within the product. The secondary photograph of this listing, where the product is held in the hand, demonstrates the variability of the shades. Observing listings with different grain sizes from this one, it is possible to appreciate the color variations that are mainly given by the degree of humidity of the material at the time the photograph was taken.