What's the difference between a gem and a diamond?

Diamond is a kind of precious stone. The following are the definitions of diamonds and precious stones, refer to Baidu Encyclopedia.

Definition of gem:

Gem is the most beautiful and valuable rock. They are bright in color, crystal in texture, brilliant in luster, hard and durable, and rare. They are natural mineral crystals and can be used to make jewelry, such as diamonds, rubies, sapphires and emeralds. There are also a few natural mineral aggregates, such as agate and opal. There are also a few organic substances, such as amber, pearls, corals, coal powder, ivory, etc., which are also included in the broad sense of gems.

Treasures-diamonds, rubies, sapphires, emeralds, aquamarine, cat's eye gems, discolored gems, topaz gems, opals, tourmalines, pointed gems, garnet gems, zircon gems, olive emeralds, emeralds, quartz cat's eyes, feldspar gems, etc.

Stones-turquoise, lapis lazuli, hibiscus stone, wood-changed stone (also known as tiger skin stone), peach stone (also known as golden powder jade), malachite, sapphire, sheep liver stone, tiger eye stone, Dongling stone, etc. Among them, turquoise is a famous product in Yunyang County, Hubei Province, China.

Crystal-crystal, amethyst, topaz, ink crystal, tea crystal (also known as smoke crystal), soft crystal, bristle crystal and hair crystal. Its minerals are widely distributed and produced all over China. (The above three kinds of gems, stones and crystals are all inorganic gems.)

Coral is a benthic coelenterate fossil, red and white, which is produced in Taiwan Province Province, China, with excellent quality.

Beads-pearls (seawater pearls and freshwater pearls) and cultured pearls (seawater pearls and freshwater pearls). Coral and pearls are organic gems, also known as biological gems. )

Definition of diamond:

[Edit this paragraph] The moral characteristics and origin of diamonds

Diamond diamond

Diamonds are gem-grade diamonds. Its English name Diamond comes from the Greek agonist, which means "unconquerable".

It truly reflects the unparalleled hardness of diamonds, so this name has been used since the middle of16th century.

Category: Natural Elements

Component: c

Hardness: 10

Specific gravity: 3.52

Cleavage: complete octahedron

Fracture: Shell-shaped.

Crystallization characteristics: equiaxed crystal system, common octahedron, rhombic dodecahedron and cubic crystal form, with stepped growth lines and green crystal faces.

Long cone or erosion.

Genesis: It often occurs in kimberlite (breccia mica peridotite) of ultrabasic rocks and in rock pipes.

Luminous characteristics: blue, yellow, orange and pink with weak intensity under ultraviolet fluorescence have long and weak short wave; After exposure to the sun, you can

Pale blue phosphorescence; Most of them emit sky blue or light blue fluorescence in X-rays, and a few of them do not, and they are blue or green in cathode rays.

Light.

Quality evaluation principle: 4C classification principle, namely color, cleanliness, cut and quality.

Carat. But this classification principle is only applicable to the quality evaluation of colorless series diamonds, not to colored diamonds and all kinds of optimized diamonds.

Evaluation.

Origin:

/kloc-Before the 0/9th century, India was the only diamond producing area in the world. At that time, the main mining was diamond placer impacted by rivers. Ever since I found out

South Africa has played an extremely important role in the world diamond market since the initial Kimberly diamond mining. With a new primary diamond mine

After the discovery of K-Mg lamprophyre, Australia's diamond production jumped to the top in the world. Diamonds produced in Siberia also

Take the lead.

In addition to the above-mentioned diamond producing areas, Brazil, Venezuela and Guyana in South America and Indonesia and China in Asia also have one each.

Fixed diamond production.

Related legends and symbolic meanings:

People once thought that diamonds came from Tianshui or dew. In Sanskrit, the word diamond means lightning, which means that diamonds are born from lightning.

Faith.

Before the Renaissance, the highest temperature that humans could reach with fire could not hurt diamonds. The legend that this kind of diamond is not bad, one

It spread until16th century when the diamond cutting and grinding industry started in Europe. For hundreds of years, people have always thought that diamonds are indestructible, so the wearer

The concept of not being destroyed makes it sell well in the era of disease. During this period, all kinds of legends suggested that there was an exercise.

The benefits of stone, such as victory, strength, courage, power, wealth, eternal life, happiness, friendship, avoiding evil, staying young forever and making dreams come true.

Really, wait. Some even say that diamonds can make people invisible and bring the dead back to life.

17 and 18 centuries, with the gradual popularization of diamonds, the legends of plague and witchcraft gradually faded, and people's worship of their divine power gradually turned into symbols and hearts.

Rational association. Almost every country's princes and nobles have a legendary experience related to diamonds, which makes them powerful.

Symbol. 1700 years ago, diamonds were almost all owned by the royal family, and their image could not be separated from the royal atmosphere. Debir 1948

Alice used the slogan "Diamonds are eternal" to promote that engagement diamond rings and wedding anniversary rings are love.

Symbolize and express continuous commitment. Love is the biggest reason why people buy diamonds at present.

Major diamond cutting and grinding centers:

Antwerp, Tel Aviv, Mumbai and new york, USA.

In fantasy novels and games:

Besides being a precious gem with high value, as a philosopher's stone, soldiers and magicians all think that the hardness of diamonds is invincible.

Symbols, fortune tellers and poets call it the unfathomable mystery of human life.

Diamonds often become sacred stones for undead monsters. Amulets inlaid with diamonds can resist death spells, and weapons can protect undead monsters.

The attack power and damage power are enhanced, and the armor is more protective when facing the attack of the undead (in Diablo, the shield with diamonds,

A card can increase all the resistance of the holder. When a spell brings the dead back to life, a diamond or enough diamond powder

It is a necessary magic material. In the third edition of ADND rules, there are the following spells that use diamonds: Glyph of Guardian (Guardian)

The image of the guardian), the great carving of the guardian, the meteor group (star rain),

Undetected, protected from spell damage, resurrecting the dead,

Recovery, resurrection, stone skin, Syol (mark

Surgery), temporary stagnation (pause), real recovery (rebirth).

Add two points:

Diamonds are the fastest conductive materials in the world. If your CPU has a diamond radiator, then … you must be crazy.

Among natural materials, diamond is the hardest, but in theory, CN3 is much harder than diamond. Unfortunately, there is no industrial production.

This method, even in the laboratory, can't guarantee the accurate carbon-nitrogen ratio.