It's called "Figured Wood".Please see related link below!
Free wood burning patterns have instructions on how to use the pattern. Woodworkers Woodshop and Carving Patterns have free patterns for wood burning. Another option is that you can draw a pattern by hand for your wood burning project.
Petrified wood forms through a process called permineralization, where organic material, such as wood, is buried under sediment and subjected to mineral-rich water. Over time, minerals like silica, calcite, or pyrite seep into the wood's cellular structure, replacing the organic material while preserving its original form. This process can take millions of years, resulting in a fossilized version of the wood that retains its texture and structure but is now composed of stone. The final product often displays intricate details of the wood, including growth rings and bark patterns.
Walnut wood typically has a darker, chocolate brown color with rich, deep tones. In contrast, cherry wood has a reddish-brown hue that can vary from light to dark. The grain patterns of walnut are usually straight and can have some swirls, while cherry wood often displays a fine, straight grain with occasional small knots.
Petrified wood is a fossil of a once living tree; the fallen tree is first tree is covered with sediments , then the organic material is replaced gradually by minerals (usually silicate minerals), retaining its shape and form. Petrified wood often looks like normal wood and displays annular ring patterns, bark, vessels etc. Petrified wood normally lacks the same definition that live (or recently dead) wood does. One obvious difference is that petrified wood is considerably more dense than wood.
To create decorative patterns on wood using wood grooves, you can use a router with different bits to carve designs into the wood. By adjusting the depth and width of the grooves, you can create intricate patterns and textures on the surface of the wood. Experimenting with different router bits and techniques can help you achieve unique and visually appealing designs.
I found the three items listed there in the Related Linkssection by using Clusty.com and searching for "free wood carving patterns".
www.google.com ASK: Free woodburning patterns
To identify different types of wood by examining their grain patterns, look closely at the lines and patterns on the surface of the wood. Different types of wood have distinct grain patterns, such as straight, wavy, or interlocking grains. You can also consider the color, texture, and density of the wood to help determine its type. Additionally, using a magnifying glass can help you see finer details in the grain pattern that may be unique to certain types of wood.
Parquet.
To identify wood by its grain pattern, look for unique patterns of lines and swirls in the wood's surface. Different types of wood have distinct grain patterns, such as straight, wavy, or interlocking grains. You can also examine the color and texture of the wood to help identify it.
Man made wood are called engineered wood or composite wood,