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You know what? Many gemstones are actually "dragging the family", such as emerald, which is a member of the beryl family, and Tsavray, a member of the garnet family.
And in these families, there are always one or two "special" existence, today's popular science content, that is, which special categories of gemstones, let's take a look at it with Ji Ge
01
The beryl family
The beryl family has been in the limelight lately, with emeralds firmly on the throne of the emerald king, aquamarine and morganite being popular fried chickens, but even though the family is so famous, there are some special breeds that are often overlooked.
Maxi-type beryl
Maximilian beryl (source network)
Maxi-type beryl is a fading beryl that, when first excavated, generally appeared as a deep sapphire blue, but soon faded when placed in the sun for a period of time.
26.72 ct maxixe beryl has an unusual violet color (source gia)
Maxi-type beryl was first discovered in 1917 at the Maxi Mine in Minas Gerais, Brazil, and got its name from it.
The study found that the reason for the fading of this gemstone is that it is colored by the center of color, and the color caused by the center of color is extremely susceptible to the action of light and heat and is not persistent.
"Trapicz" emerald
"Trapicz" is a special growth phenomenon, it has a pattern such as a gear for squeezing sugar cane, usually manifested as a hexagonal "nucleus" and six "arms" - the arms radiate outward from the middle.
The gemstone was first discovered in Colombia and produced very rarely, and has since been produced in Brazil, Zambia, Madagascar and other places.
Its formation is mainly controlled by crystallization habits, which is related to chemical composition and growth structure, and is affected by temperature and pressure.
Trapiche emeralds
"Trapicz" is not unique to emeralds, such as rubies, sapphires, crystals, spinels, etc. have the production of gem varieties with this phenomenon.
02
Corundum family
The corundum family is also the ace family of the gemstone world, and the two major gemstones of ruby and sapphire sit in the town, attracting countless admiring eyes for the corundum family, and there are many magical beings in this family.
Papalachcia sapphire
The magic of Papalachian sapphires is not only that they combine orange and pink, but also because some Papalachian sapphires fade.
Papalachian sapphire is a sapphire color that blends pink and orange tones, and in the market, because this orange pink and pink orange also coincide with the sun and sunset colors.
Papalachcia Sapphire (Source Ssef)
Papalachchia has two causes of color, one is due to the combined action of the trace elements cr3+ (which causes a pink hue) and fe3+ (which causes an orange hue) inside the gem, and the other is due to cr3+ and the color center.
Image source ssef
An untreated colored sapphire from Madagascar that, after a color stability test, exhibits a color change from pink-orange (a color similar to a lotus sapphire) to pink.
The color center of the gemstone will have the risk of fading, so the purchase of Papalachia sapphire must look for an international authoritative certificate.
For Papalachia sapphires, guild gem laboratories can issue identification reports and provide color stability testing services.
Guild Gem Laboratory Paparacia Sapphire Test Report Sample (Color Stability Tested)
Guild Gem Laboratory Paparacia Sapphire Test Report Sample (Color Stability Test Not Required)
03
Family staying in Europe
Different kinds of natural opal
Opal, is a set of various colors in one of the gemstone, because of this appearance, is also affectionately known as "nature's palette", and this phenomenon is derived from the opal color effect, but the family of pink opal and blue opal does not have a color effect, it is very simple.
Powder opal
Van Cleef & Arpels powder opal jewellery (source network)
Pink opal is a kind of opal without color change effect, its delicate color, warm and delicate texture, known by Westerners as "angel's skin", this is a rare gemstone, mainly produced in Peru, Mexico.
Blue opal
Blue Opal (Source Network)
The same blue opal, which has not changed color, is also fascinating because of a unique blue color, this opal is mainly produced in Peru, symbiosis with copper ore, because of copper ions and color rendering, the more copper content, the more intense the blue of opal.
04
Tourmaline family
Tourmaline, also known as tourmaline, can produce almost any color, it is precisely because of this feature, so it is called "rainbow gemstone", more special is that on a certain line of tourmaline, you can see a variety of colors, some can also form a special pattern.
Watermelon tourmaline
Watermelon tourmaline is a kind of inner infrared green tourmaline variety, because it resembles the color distribution of watermelon, so it is called "watermelon tourmaline", this color distribution of watermelon tourmaline is mainly related to the concentration of color-causing elements around the crystal during the growth process.
Calcium-lithium tourmaline
Calcium-lithium tourmaline (source gia)
The origin of calcium-lithium tourmaline is similar to that of watermelon tourmaline, which is often cut along the direction perpendicular to the c axis of the crystal, and after polishing, a "trident star" or triangular area pattern similar to the Mercedes-Benz logo can be seen.
This is a characteristic identifier of calcium-lithium tourmaline. It is precisely because of this unique ribbon that it is favored by mineral label collectors.
05
Garnet family
The garnet family is a large family, because there is a wide range of similar image substitution, so there are rich color family members, and one of the small partners because of the rich green, special horsetail filament inclusion, more than the sparkle of the diamond, in one fell swoop became one of the most expensive members of the garnet family, which is the calcium garnet - garnet.
demantoid
The garnet has the highest refractive index of any member of the garnet family and a dispersion value of up to 0.057, which gives it an unusual fire and is known as "a gem that shines more than a diamond".
Horsetail-like inclusion in a vertegraine
In addition, it contains a "horsetail-like" inclusion inside, which makes it look different. If the inclusions are beautiful and under the countertop, they increase the price of the garnet, which is very different from other gemstones.
06
Pearl family
Pearl is one of the oldest known gemstones, and because of its unique texture, it resounds throughout the five continents and is known as the "Queen of Jewelry".
This is a large family, further classified due to the growing environment, the different types of mollusks that produce pearls, Australian white, Tahitian black pearls, akoya pearls, conch beads, Merlot pearls, etc. are often mentioned pearls in the market, of course, there are also special varieties of these pearls that you have never noticed.
Round clam pearls
Round clam pearl (source gia)
Round clam pearls are mainly produced in the bivalve mollusk North American round clam, mostly not round, often with a flat bottom button shape, the surface can be seen to characterize the "flame structure", usually white to brown, and light pink purple to dark purple.
Rare set of 45 round clam pearls. Image credit: Bonhams jewels. | Image 2: Image source: Treasure Restoration. | Figure 3: A rare round clam pearl ring. Image credit: Bonhams jewels.
These pearls take about 4-8 years to form, and the rarest and most precious clams are purple or lilac, the only mollusk that naturally produces purple pearls.
epilogue
These special varieties always make us marvel at their magic, and it is because of this uniqueness that they can be more noble, the world of gemstones is so magical, and there are more stories waiting for us to explore.
Let's have a little interaction: which of these special categories of gemstones is the first time you know? Welcome to leave a message to discuss ah~