Further reading of crystals, Spring Rain crystal essay reading and answers

Pure and natural, unpretentious things are beautiful things.

2. In the author's opinion, what is the most commendable thing about the workers who arrange the stone steps?

He is acting as he is, neither hiding nor revealing.

3. What is the connection between the workers who row the stone steps at the beginning and the pebbles on the seashore at the beginning?

The worker "arranges the stone slabs in an almost leisurely manner, he does not use cement or any adhesive at all, he just adjusts the stone slabs with different shapes along the hillside", and the pebbles are "not hidden, nor deliberately revealed", but all appear natural and truthful.

4. "Not far away, there is the sea, a layer of green, a layer of blue, a layer of indigo, a sea without pollution at all." What does this sentence do to convey the center of the article? Please tell us more about it.

The description of the scenery (the clarity of the sea) sets off the theme of "we need a heart that is as clear as crystal and has no artificiality".

Spring rain is likened to silver silk wine, what else can you think of to write it down?

Roll men's women's denim** cowboy himself at home is in this life and this life you say you.

Look at the shape, the shape should be good.

Second, look at the color, the color should be positive.

Third, look at the crystal teeth, the crystal teeth are big.

Fourth, look at the whole, in the whole, the crystals should be thick, the skin should be thin, and the holes should be distinct.

Fifth, look at the weight, the weight is good.

There are many kinds of this, when we used to sell crystals, the boss taught, the cornucopia is mainly to see the overall feeling of comfort, too much agate is not too good, the crystal hole in the middle should be slightly larger, but the crystal can not be too little, the color is positive, the particles are uniform. Don't have some big and some small, just do it. After buying it back, you can just spray some water to maintain it.

The skin is a little thinner, the crystals inside are a little thicker, and the holes are more distinct.

The color of the crystal is positive. That's it...

Crystal cornucopia: There are agate and crystal.

Don't choose a cornucopia with cracks, the cornucopia is to gather wealth, and if there are cracks, there will be scattered wealth. Generally water-saving try, there are many cornucopia cracks will be combined with glue, you use a light to shine, reflective not. Cornucopia options: large body, thin walls, large inner basins, you can do it.

The main component of crystal is silicon dioxide (SiO2), and silicon (Silica) is also the most important mineral compound that accounts for more than 65% of the composition of the earth's crust.

Quartz crystal is a colorless and transparent large quartz crystalline mineral. Its main chemical component is silicon dioxide with the chemical formula SiO2. The crystal is colorless, purple, yellow, green and smoky, etc., with a vitreous luster, transparent to translucent.

Hardness 7, brittle, no cleavage; The density of the crystal gram cubic centimeter, the refractive index of the crystal, hardly exceeds this range; The crystal is dispersed, and the melting point of the crystal is 1713.

When pure, colorless and transparent crystals are formed, and when they contain trace elements such as AL and FE, they are purple, yellow, brown, etc., and irradiated trace elements form different types of color centers to produce different colors, such as purple, yellow, brown, pink, etc. Containing associated inclusions are called inclusion crystals, such as hair crystals, green ghosts, etc., and the inclusions are rutile, tourmaline, actinolite, mica, chlorite, etc.

The composition of crystals is indeed silicon dioxide (SiO2)! Strictly speaking, only the transparent is the crystal, the impermeable is the quartz, and some crystals have wrappers, such as hair crystals, green ghosts, strawberry crystals, these are crystals that encapsulate the actual substance!

Crystals are a member of the quartz family and are one of the most common minerals. It is usually formed in igneous specialized rocks, metamorphic rocks and sedimentary rocks.

It belongs to the academic formula SiO2, the Mohs hardness is 7, the end of the crystal is a rhombic hexahedral cylindrical or angular pyramid, the crystal plane is usually striped and vitreous, and the inclusions are abundant. Generally speaking, the purer the color, the brighter the crystal, and the higher the clarity and refractive index, the higher the value of the crystal. "Materia Medica" contains:

There is Yansa stone (that is, crystal) in Jiazhou Emei Mountain, the shape is six-edged and sharp, and the color is clear and white. ”