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[DR.C.NARAYANI]

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Hello VR Mam, wow such a wonderful creations ,very good imagination comments of yours, that flow very freely.thanks a lot for your work.:yo::yo: :first:.

 

[Visalakshi Ramani]

As usual you are very kind! Thank you dear Dr C.N. ray2:

Hello VR Mam, wow such a wonderful creations ,very good imagination comments of yours, that flow very freely.thanks a lot for your work.:yo::yo: :first:.

 

[Visalakshi Ramani]

After completing the wonderful feature of human body I will revive this thread with posts on minerals
and gemstones. Though I wish to make it a daily contribution, it will be very difficult.
So they will appear one or twice a week.

 

[Visalakshi Ramani]

#1. Minerals, Rocks and Gemstones.

A mineral is a naturally occurring substance that is solid and stable at room temperature. It has an ordered atomic structure and is representable by a chemical formula. A rock can be an aggregate of minerals or non-minerals, and does not have a specific chemical composition.

The exact definition of a mineral is under debate, especially with respect to the requirement a valid species be abiogenic, and to a lesser extent with regards to it having an ordered atomic structure. Mineralogy is the study of minerals.

There are over 4,900 known mineral species; over 4,660 of these have been approved by the International Mineralogical Association ( I.M.A ).

Over 90% of the Earth's crust is composed of Silicate minerals. The diversity and abundance of mineral species is controlled by the Earth's chemistry. Silicon and oxygen constitute approximately 75% of the Earth's crust, which translates directly into the predominance of silicate minerals.

Chemical and Physical properties distinguish the minerals. Chemical composition and crystal structure distinguish the various species. These properties are influenced by the mineral's geological environment of formation. Changes in the temperature, pressure, and bulk composition of a rock mass cause changes in its mineralogy. When the temperature and pressure change, its mineralogy changes as well.

Minerals can be described by their physical properties, which relate to its chemical structure and composition. Crystal structure, habit, hardness, luster, whether or not it is diaphanous, color, streak, tenacity, cleavage, fracture, parting and specific gravity are the common distinguishing characteristics. Reaction to acid, magnetism, taste, smell and radioactivity are the more advanced tests.

Minerals are classified by key chemical constituents. Silicates, sulfides, oxides, halides, carbonates, sulfates, phosphates and naive elements are the important mineral groups.

 

[Visalakshi Ramani]

Dear friends,
The subsequent posts in this thread will appear on the
5th, 10th, 15th, 20th, 25th and 30th of every month.

 

[nannilam_balasubramanian]

What is she looking for

 

[nannilam_balasubramanian]

Where does Kamadhenu proceeds

 

[nannilam_balasubramanian]

What this person looks at

 

[nannilam_balasubramanian]

Human imagination is multifarious

 

[nannilam_balasubramanian]

an allegorical event

 

[nannilam_balasubramanian]

A fairy holding a butterfly

 

[nannilam_balasubramanian]

Human mind opened by a light

 

[nannilam_balasubramanian]

Perhaps this is the real identification of black sheep

 

[nannilam_balasubramanian]

She is flying on the roof top

 

[nannilam_balasubramanian]

Someone is woken up

 

[nannilam_balasubramanian]

Recollection of ester years of village life

 

[nannilam_balasubramanian]

She is in dilemma in which direction to proceed

 

[nannilam_balasubramanian]

It knows how to cross the line

 

[nannilam_balasubramanian]

Perhaps no time to sleep

 

[renuka]

Aan Puthi Pin Puthi! LOL

 

[Visalakshi Ramani]

Aan Puthi Pin Puthi! LOL

I see only an EMPTY room!!!
Where are the contents
supposed to be in there??? :shocked:

 

[Visalakshi Ramani]

Perhaps no time to sleep

And no place to sleep either!!!

 

[Visalakshi Ramani]

It knows how to cross the line

I hope one of them is not you!!! :nono:

 

[Visalakshi Ramani]

She is in dilemma in which direction to proceed

Don't worry about it. The train coming in either of those tracks will decide her destination.

 

[Visalakshi Ramani]

Someone is woken up

Unfortunate YOU NEVER DO!!!

Posting copyrighted images in my thread again???