The lava is pahoehoe Lava.
It is called a glaze.
Obsidian
If your talking about colored pencils, put your color down on the page and go over it very hard with the white or yellow in you set, this is called garnishing.
but not
hard white substance covering the crown of a tooth. a colored glassy compound (opaque or partially opaque) that is fused to the surface of metal or glass or pottery for decoration whether jewelry or protection a paint that dries to a hard glossy finish coat, inlay, or surface with enamel any smooth glossy coating that resembles ceramic glaze.
The lava is pahoehoe Lava.
Pahoehoe or pillow lava - same thing
It is called a glaze.
The appearance or quality of light reflected from the surface of a mineral is called luster. Luster describes how the surface of a mineral shines or reflects light, and it can be described as metallic, vitreous (glassy), pearly, earthy, or dull.
This is called the luster of the mineral.The luster of a mineral is the way its surface reflects light. Most terms used to describe luster are self-explanatory: metallic, earthy, waxy, greasy, vitreous (glassy), adamantine (or brilliant, as in a faceted diamond).
The glassy surface with lots of small holes in the rocks is typically associated with volcanic rock called pumice. Pumice forms when volcanic lava cools rapidly and traps gas bubbles, creating a lightweight, porous material. Its glassy texture and numerous holes give it a distinctive appearance, making it useful in various applications, including as an abrasive in beauty products and in landscaping.
a rock
Scoria typically has a glassy texture due to rapid cooling of magma when it reaches the surface and solidifies, forming small air bubbles within the rock. This glassy texture gives scoria its characteristic appearance and light weight.
No, metallic and glassy are not types of cleavage. Metallic refers to a type of luster in minerals, while glassy describes the appearance of a mineral's surface. Cleavage refers to the way a mineral breaks along planes of weakness.
Tektites
obsidian
Obsidian