Aventurine is a very positive stone of prosperity. It has a stong connection to the devic kingdom and is used to grid gardens or houses against geopathic stress. Wearing Aventurine absorbs electomagnetic smog and protects against enviromental pollution. This crystal defuses negative situations and turns them around.
The information provided is from Judy Hall "The Crystal Bible".
The word Merkaba is made up of three smaller words — Mer, Ka, and Ba, which came from ancient Egyptian texts.
"Mer" refers to light. It is seen as a two counter-rotating fields of light spinning in the same space.
"Ka" refers to the individual spirit’s interpretation of its particular reality.
"Ba" is usually defined as the body or physical reality.
So, Merkaba is a counter-rotating field of light that affects spirit and body simultaneously. It is a vehicle that can take spirit and body from one world, or dimension into another. Merkaba means "chariot" in Hebrew.
Meditation and accomplishment of a Merkaba field of energy about your body will make your thoughts and feelings become thousands of times more powerful.