The goal of this research is to determine whether geopolymer bricks can be made using Fly ash (FA), Rice husk ash (RHA), and Marble dust powder (MDP). It has been researched that the process of Geopolymerization, which uses materials that have been alkali-activated to build solid structures, offers potential as a sustainable substitute for conventional brick-making techniques. In this work, to investigate the qualities of geopolymer bricks manufactured with Fine aggregate, geopolymer brick samples were made using various combinations of fly ash, RHA, and marble dust. The researchers next tested the bricks for compressive strength, water absorption, and efflorescence to establish their quality and durability. When making geopolymer bricks with fly ash, Rice husk, marble dust, and alkaline soda-based chemical activator solution are used, along with sodium silicate, water, and a variety of Na2O/ (Al2O3 + SiO2) ratios. For this investigation, a typical brick size of 230mm x 110mm x 75mm was employed. Fly ash (50%-70%), fine aggregate (15%), Rice husk ash (15% - 30%), and Marble dust powder (5%- 30%) were used in different amounts to make the bricks. The goal of this study was to look at the impact of these various proportions on the characteristics of bricks. For all the mixture, a sodium hydroxide molarity of 12M was maintained, and the sodium silicate ratio was held fixed at 1:2.5. Fly ash building bricks of the dimensions 230 mm x110 mm x75 mm are produced during this procedure under atmospheric curing. Additionally, the compressive strength of the geopolymer bricks was compared to that of conventional bricks commonly found in the area. Different combinations of materials were used to cast and cure the geopolymer bricks under atmospheric conditions. The results showed that the geopolymer bricks made with M-sand had better compressive strength compared to those made with natural sand. The findings suggest that M-sand can be a practical alternative to natural sand for geopolymer brick production. The use of recycled material as a substitute for fired bricks in construction can supply both construction brick and economic benefits. The outcomes suggest examining the environmental and economic impact, as well as the geopolymer brick's durability properties, which would be compelling research. To measure the strength of the geopolymer bricks, compressive strength tests were done after 7, 14, and 28 days. The brick will then be examined for soundness, Efflorescence, compressive strength, and water absorption.