Learn complete rocks, minerals, crystals and gemstone guide. With complete guide
About Rocks, Minerals, Crystal Guide
Rocks, Minerals, Crystal Guide is an education app developed by Alpha Z Studio.
Download Statistics
Rocks, Minerals, Crystal Guide has been downloaded 25 thousand times. In the last 30 days, the app was downloaded 220 times.
User Ratings
Rocks, Minerals, Crystal Guide is rated 3.86 out of 5 stars. The rating is based on 78 ratings.
App Information
Rocks, Minerals, Crystal Guide is FREE to download. The APK download size is 7.82 MB. The latest version available is 1.0.1. The last update was on April 19, 2025.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play April 2023.
Description
What are Rocks A rock is a solid mass of geological materials. Geological materials include individual mineral crystals, inorganic non-mineral solids like glass, pieces broken from other rocks, and even fossils. The geological materials in rocks may be inorganic, but they can also include organic materials such as the partially decomposed plant matter preserved in coal. A rock can be composed of only one type of geological material or mineral, but many are composed of several types.
Rocks are grouped into three main categories based on how they form. Igneous rocks form when melted rock cools and solidifies. Sedimentary rocks form when fragments of other rocks are buried, compressed, and cemented together; or when minerals precipitate from solution, either directly or with the help of an organism. Metamorphic rocks form when heat and pressure alter a pre-existing rock. Although temperatures can be very high, metamorphism does not involve melting of the rock.
A rock is any naturally occurring hard solid mass. In terms of composition it is an aggregate of minerals. For example granite rock composed of quartz, feldspar and mica etc.
What are Minerals A mineral is an element or chemical compound that is normally crystalline and that has been formed as a result of geological processes. Examples include quartz, feldspar minerals, calcite, sulfur and the clay minerals such as kaolinite and smectite.
Minerals are naturally occurring elements or compounds. Most are inorganic solids (apart from liquid mercury and a few organic minerals) and defined by their chemical composition and crystal structure.
Minerals can be readily identified by several physical properties such as hardness, lustre, streak and cleavage. For example, the mineral talc is very soft and easily scratched whereas the mineral quartz is quite hard and not so easily scratched.
Crystals crystal, any solid material in which the component atoms are arranged in a definite pattern and whose surface regularity reflects its internal symmetry. All minerals form in one of seven crystal systems: isometric, tetragonal, orthorhombic, monoclinic, triclinic, hexagonal, and trigonal. Each is distinguished by the geometric parameters of its unit cell, the arrangement of atoms repeated throughout the solid to form the crystal object we can see and feel.
What all crystals have in common is an extremely well-organized molecular structure. In a crystal, all of the atoms (or ions) are arranged in a regular grid pattern. For example, in the case of table salt (NaCl), the crystals are made up of cubes of sodium (Na) ions and chlorine (Cl) ions. Each sodium ion is surrounded by six chlorine ions. Each chlorine ion is surrounded by six sodium ions. It's very repetitive, which is exactly what makes it a crystal!
Gemstones A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, in cut and polished form, is used to make jewelry or other adornments.
Gemstones are minerals, rocks, or organic matters that have been chosen for their beauty, durability, and rarity and then cut or faceted and polished to make jewelry or other human adornments. Even though most gemstones are hard, some are too soft or fragile to be used in jewelry, so they are often exhibited in museums and sought by collectors.
Gemstones Color Gemstones are diverse in their beauty, and many are available in a stunning variety of shades and colors. Most gemstones have little beauty in the rough state, they may look like ordinary rocks or pebbles, but after a skilled cutting and polishing the full color and luster can be seen.
Get a detailed PDF report for Rocks, Minerals, Crystal Guide with download trends, rating history,
and key performance statistics — useful for competitive research or tracking your own app.
Learn more
Are you the developer of this app? Join us for free to see more information about your app and learn how we can help you promote and earn money with your app.
Comments on Rocks, Minerals, Crystal Guide for Android
★★★★★Ahmad Khan· Apr 3, 2023
This app is very good. All the content in the app is also very interesting. Thank you to the team for such a good app. 😍🥰😍
★★★★★Mährab Khan· Apr 3, 2023
Wow such an amazing learning application of rock and minerals the crystals lectures is so amazing and good. Highly recommended it.
★★★★★drybonez2987· Jan 13, 2024
L really like it that’s why you got five stars but ldid run in to an issue but can't read all the gemstones in less you pay l though this was a free gem app it said contain Ads it looks like you want money to look at the rest of the gems
★☆☆☆☆Joseph Sokolik· May 22, 2023
App used as advertising pro-app. Has pictures and names of rocks. Push the arrow or any place on the app and takes you to an add telling you hou much better the pro app is!! Don't waste your time.
★★☆☆☆Sandra L. Webster· Dec 10, 2023
Deceiving promo I thought I finally found an app to turn to when I return from a day hicking and collecting a few rocks. Ha! Not so. If you want to look up and research anything, go get yourself a good set of encyclopedias my friends. You will not get anything from here.
★☆☆☆☆Nikita Preece· Aug 12, 2024
2 ads within 5 minutes and then with my second click I was told to buy premium. Not enough time to explore the app to even decide if I would buy.
Google Play Rankings for Rocks, Minerals, Crystal Guide
This app is not ranked
Technologies used by Rocks, Minerals, Crystal Guide
Rocks, Minerals, Crystal Guide is requesting 17 permissions and we don't have library information (yet).
Show details
Back to top
AppBrain Intelligence premium content
Subscribe now to get full and unlimited access to AppBrain Intelligence.
You'll have access to:
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
![Cake Recipes [Offline] icon](https://lh3.googleusercontent.com/mUi_XBpXZPV44tX1ryYGzHNMWI-BAHXOYq2BPum7NEFmIc6kDS_QF_ry9oZ8k1l_Y0gYkMZN28KQ3qnCthI9SP4MAnxSy7qjRlFX=s96-rw)
![Math Formulas [Offline] icon](https://lh3.googleusercontent.com/aq1qkXWyTvLeg56HF1FJqFKve0on3YMkNx7NDfaRstjSACYirPwVxApR22KI87g0DZa5UxBsVQeatQKcy4fdzgnjZqTyh4M_Zdlx=s96-rw)
