## 1 Introduction  
The state of Rio Grande do Sul, located in the south of Brazil, stands out nationally and internationally for its wealth of precious stones, such as agate and amethyst, which are exported to several countries in the world. According to [PERSON] and [PERSON] [1], the state is recognized as the world's largest producer of raw agate [2]. The town of Soledade/Rio Grande do Sul (RS) was a pioneer in extracting, processing, and commercializing precious stones. Currently, it has only one industrial and commercial area of gemological asset, which accounts for a large part of its economy; 71% of companies in this area are exporters [3]. Brazilian agate and amethyst run through deposits of the \"basalt geode\" type [4,5], and have been crystallized in the cavities of the volcanic rocks of the Serra Geral Formation, with their diameter varying from 0.1 to 1.0 m. The geodesics are filled with minerals that are formed based on a colloidal silica system [6]. Other minerals are found in these deposits, such as quartz, rock crystal, rosy quartz, calcite, apophyllite, zeolites, onyx, jasper, opal, gypsite, and barite. [PERSON] [7] identified that the agate coming from these deposits is formed by granular and fibrous microcrystalline quartz, known as chalcedony. In the industrial processing of gems, a substantial amount of solid waste is generated, such as fragments of agate, mud with oil, agate powder without oil, and wastewater containing dyes and metals, aside from semi-finished parts that have defects in their formation or impurities and have no commercial value [8; 9; 10]. The \"Rolled Stone\" (Figure 1a) is generated through agate processing and gives a round shape to the agate fragments through a ball bearing drum device (Figure 1b). In the rolling process of agate, [PERSON] [11] estimates that about 30 tons per month of ground agate powder, known as \"Rolled Powder (RP)\" (Figure 1c), are produced in local industries. The RP is comprised of approximately 98% SiO\({}_{2}\) with 95% of the particles that have a diameter less than 74 \(\upmu\)m. It can be estimated that for each kilogram of final product, 0.65 kg of agate powder is generated by the rolling process [9]. [PERSON] et al. [12] claim that the production of agate and amethyst, in the state of Rio Grande do Sul, is approximately 418 tons/month, of which 130 tons/month are processed in Soledade/RS producing more than 6000 pieces/month. This agate processing generates about 80 tons/month of solid waste, that it is usually stored in own company areas that may cause environment damage, such as the waterproofing of soil, rivers contamination, and others. The reuse of the agate residues as raw material for the manufacture of new products may be an alternative to reduce the use of natural resources. In this sense, the civil construction is an excellent alternative to receive this waste, contributing to the minimization of environmental impacts, since the extraction of raw materials used by this segment generates large impacts, has a high energy consumption, and has a waste generation [13]. For example, these wastes can be used as aggregates replacing the natural sand, which is in scarce in the state of Rio Grande do Sul. Several studies have been carried out in order to take advantage of the residues produced by precious stone industries in mortars, concretes, and other materials. [PERSON] et al. [11] studied the potential development of alkali-silica reaction in mortars based on different blends agate waste and concluded that the inclusion of powdered agate waste reduces the deleterious effect of alkali-silica reaction, and expansions higher than 0.19% were not identified. [PERSON] et al. [14] evaluated the feasibility of using the \"rolled powder\" as mineral addition, noting that the proportion of up to 10% can replace cement, making the concrete produced more sustainable. [PERSON] et al.