Spinel - both the "red" of ruby ​​and the "blue" of sapphire

Spinel's history as a gemstone dates back at least to the Middle Ages, when the King of Spain used it for an army, and several generations of rulers used it to document the rise and fall of the Mughal Empire.

But what is embarrassing is that spinel has been misunderstood or even misunderstood for a long time: in the era when there was no systematic gemology, people mainly distinguished the gemstones according to color and appearance. The ancient Roman scholar Pliny called all red gems collectively carbunculus; in many subsequent documents, spinel was also called BalasRuby. The word Balas comes from the Persian place name "Badakhshān", which is roughly located in the northeastern part of Afghanistan and northern Tajikistan. It was once rich in "ruby". It is said that the famous Black Prince's Ruby and TimurRuby "Ruby" are produced. Since this area. Although BalasRuby emphasizes the concept of origin, the beauty of the splendid is still endorsed by rubies.

Looking back to modern times, science and technology finally gave the spinel a name, but this beautiful stone has become a "cheaper ruby ​​substitute" in the eyes of many people. The invention of synthetic spinel technology casts a shadow on the natural spinel. When the public is convinced by the charm of the red treasure, the spinel can only be quietly collected for a few experts.

In recent years, with the growth of the market and the popularity of knowledge, more people have begun to understand the beauty of the spinel that is similar to the red treasure but different from the red treasure.

(The British Empire crown, with the famous "Black Prince" and "Ruby" in the middle, the middle and lower part of the world is the world's second largest diamond "Curinan No. 2", the crown of the top of the crown is set with the St. Edward Sapphire (the crown of the cross center), the crown There are 4 rubies, 11 emeralds, 16 gemstones, 227 pearls and more than 2,800 diamonds.

(Tiemuer "Ruby", there are six remarks engraved on it. One of them is a Persian sentence written in Arabic squiggles: "This ruby ​​is the 25,000 treasures of the king of the king, Sahib. First, in 1953 (according to the 1740 AD), the Hindustan treasure trove into Isfahan. "The other five are the names of those who obtained the gems."

The word Spinel combines the Latin Spina with the Greek Spinther. The former represents the thorns, and the metamorphic rough stone can form a sharp crystal form. The latter is a flash, which means the gem is vivid and shining.

The main component of spinel is magnesium aluminum oxide, which is an equiaxed gemstone, which usually crystallizes into a well-shaped octahedron, dodecahedron or contact twin. Spinel has a refractive index of 1.715 to 1.830. It is transparent or translucent. It has a glass luster to a ruthenium gloss. The clarity is generally better than that of ruby. Therefore, high-quality spines often have a brighter look. Another feature of spinel is its rich color, ranging from red, pink, orange, purple to blue, green, brown, and black. When some of the foreign elements are introduced into the original chemical composition, the original amount of magnesium or aluminum is changed to give a colorful color. The reason why the red spine, which is often mistaken, has a ruby-like color, because a small amount of aluminum inside is replaced by chrome, and depending on the content of each chemical element, red with different color, such as rich Blood red, beautiful rose and so on. When iron, titanium, zinc and other elements replace a small amount of magnesium, the spinel will appear blue. The world's major spinel producers are: Meguro, Myanmar, Sri Lanka, Vietnam, Thailand, Afghanistan, Tajikistan and Tanzania. The spinel of the big carats on the market is rare. In addition to the red sapphire spine, cobalt blue spinel, Mahenge spinel and other varieties have also begun to attract the attention of many jewelry lovers.

(a spinel rough)

(Hemmerle spinel and conch beads earrings)

(AngelinaJolie Black Spinel Bracelet)

(Vancouver Abbott black spinel and sapphire, diamond brooch)

(LouisVuitton Spinel Ring)

(Chopard Purple Spinel Ring)

Although both the iron spinel and the zinc spinel appear blue in the spinel family, the special feature of the cobalt blue spinel is that its blue color is very rich, without gray tone, and the yield is not high, very rare.

Mahenge, produced in Tanzania, is a pink spinel with a neon look. The high-quality Mahenge spinel is brilliant pink with high color saturation and a hint of velvet. It was first discovered in the vicinity of the province of Morogoro in the 1980s. Due to the lack of understanding of the pink spinel at the time, the locality still focused on mining rubies. After 2000, the Ikrako region of Mahenge once again discovered the large carats of fine pink spines. In particular, in 2007, four rare giant spinel rough stones from 6 kilograms and 54 kilograms were discovered in Tanzania. Although the original stone is opaque in the center, the outer edge is a very good gem material. It is said that many Mahenge spines of 10 to 50 carats are derived from this, and they are particularly eye-catching at the 2008 Baselworld Watch and Jewellery Show.

Mahenge (Ma Henge) spinel

Children Kn95 Face Masks
Composite nanomaterials, PM2.5 purification efficiency up to 95%.
Mask filter is soft and skin-friendly, ensuring a comfortable and healthy breathing experience.

Features and Benefits:
Stretchy
Elastic strap makes it easy and comfortable to wear, won't crack and won't hurt your ears.

Application
Suitable for 4-10 years old children. This mouth mask is perfect for running, cycling, hiking or other outdoor activities, it's also suitable for daily use.

Breathable
making you breathe freely, really comfortable. protects you from dust, wind, pollution, smoke, etc.

Comfortable
The material chosen is high quality, which is soft and skin-friendly to wear. The masks protect you from dust, wind, pollution, smoke, etc.

What does this respirator protect against?
• Filters ≥95%

• Dust

• Water-based mist

• Fumes

• Concentration of contaminants up to 20 times WEL

How long does a disposable respirator last?
These respirators generally will last about 8 hours or when it becomes too difficult to breathe and are disposable when they no longer offer full protection.

What is the difference between KN95, N95 and FFP2 protection?
Different countries use different codes and numbers to name their Standard of the respiratory face mask. But their 

Positive effection are all very similar. 

N95 (United States NIOSH-42CFR84)

FFP2 (Europe EN 149-2001)

KN95 (China GB2626-2006)

Children Kn95 Face Masks

Children Kn95 Face Masks,Children Surgical Masks,Kn95 Folding Face Mask,Nonwoven Face Mask

Suzhou Ruihan Automation Technology Co. LTD , https://www.ruihansz.com