Ribbon tuck point joint - Fremantle WA

A ribbon joint to mock stone I think in Fremantle.
The stone lacks grain and I dont even recognise the stone.
An example of what is known in the vernacular as Dado or cement glass render. Almost a lost art to get it right. As an apprentice I was privileged to see it done.
 Some apprentices out of the Building Management Authority have taken this product to the next level creating colours etc.
In the past plasterers created faux marble, some so skilled it was hard to distinguish between the real item.

Semi Circular arch niche

A stone arch niche built into a hill side with spring water to face.  This niche is actually carved into the hillside in Liverpool where water seeps.

Arches: Different types and styles

While searching the internet I found this page on Wikapedia demonstrating differnet arches.

An arch is a curved structure capable of spanning a space while supporting significant weight (e.g. a doorway in a stone wall). The arch appeared in Mesopotamia, Indus Valley civilization, Egypt, Assyria, Etruria, and later refined in Ancient Rome. The arch became an important technique in cathedral building and is still used today in some modern structures such as bridges.

http://en.wikipedia.org/wiki/Arch