Angel Stone - Per Kilo

Angel Stone, closely related to Siltstone, is a clastic sedimentary rock with silt-sized particles, is sometimes used in lapidary, though it's not as common as other rocks due to its tendency to be gritty and not easily polished.

Here's a more detailed look at siltstone in the context of lapidary:
What is Siltstone?
Composition: Siltstone is a sedimentary rock made up of silt-sized particles, which are smaller than sand but larger than clay.
Formation: It forms from the accumulation and compaction of silt-sized sediments, often in environments like riverbeds, deltas, and shallow seas.
Appearance: Siltstone can vary in color and texture depending on its formation environment, but it often appears as a fine-grained, sometimes gritty rock.
Characteristics: It is generally hard and durable, but lacks the fissility and laminations of shale.

Siltstone in Lapidary
Use: While not a common choice for cabochons or polished stones, siltstone can be used for certain lapidary applications, such as creating textured surfaces or for certain types of carvings.
Challenges: Siltstone's gritty texture can make it difficult to polish to a high shine, and it may not be suitable for all lapidary techniques.
Considerations: Lapidarists who choose to work with siltstone may need to use specialized techniques or tools to achieve the desired results.
Zebra Rock: Some siltstone formations, like the "Zebra Rock" found in Western Australia, are known for their distinctive banding patterns and can be used for lapidary purposes, though the origin of the banding is not fully understood