We have come to appreciate the color changing ability of this gem as we do with a fine alexandrite. I appreciate the lovely blue color we see when tanzanite is viewed in daylight and I get great pleasure when the blue turns to a mixed blue violet and on occasion to pure violet. Both the pure blues and those that change in daylight to incandescent lighting from blue to violet are highly desirable but the color changing gems are the ones that have endeared this gem to the novice and the aficionado of fine and rare gems.
Tanzanite can be identified by the Gemological Institute of America. They will only identify if it is tanzanite. They do not provide any grading of the quality of the stone only weight, measurements and whether it is tanzanite or not. We will be glad to provide this service at the additional charge. Turnaround is approximately two weeks.
What is the hardness and durability of tanzanite? Tanzanite is 6. It's general durability is comparable to amethyst, citrine, garnet and tourmaline. As an everyday ring you can expect scratches to occur on the crown of your gem. In 5 years with daily wear you may require re-polishing of the table of the gem which can generally be done in the mounting.
Some crown facet scratching may only be accessible by removing the tanzanite from the mounting. Pendants and earrings are not at risk of scratching. The durability of your gem can be compromised by cleaning tools used by your local jeweler. Ultrasonic cleaners can be very hot and heat shock causing cracking is possible. Cooling down the cleaning solution or slowly warming the gem may help. Although we have not experienced damage from ultrasonic use some say ultrasonic action can cause damage, so we recommend using ultrasonic cleaners only on smaller less valuable gems.
Never, never, never use steam cleaners on tanzanite, and many other colored gems. When designing a ring consider how the gem is set for future cleaning and repair. Prong set with a larger opening beneath the gem will make it easier to remove the stone from the mounting and also allow you to get a brush to the back of the gem for cleaning.
Tanzanite can be totally purple in incandescent lighting like the picture above with none of the blue secondary color. We call this ultraviolet tanzanite. All of this purple material that I have seen does a dramatic color change to blue in daylight with some secondary purple. These have a true color change and are quite rare and valued by collectors.
So to my knowledge there is no purple tanzanite if you view them in daylight, but some can be totally purple if viewed in incandescent lighting only. One of the most common questions we receive is if our Tanzanite is simulated, lab created or synthetic.
They have different meanings, but when people bring those words up describing Tanzanite, it's just not natural Tanzanite. The most common tanzanite simulant and maybe the only one that appears close to the color of tanzanite is synthetic sapphire. Synthetic means it is the same chemical makeup as the real thing just created in the lab.
There is no synthetic tanzanite only imitation which is the synthetic sapphire. All produce fine tanzanite but none have as high of percentage of fine material as "D" block and some of the material from the other blocks show an undesirable green secondary color which cannot be burned out of the gem.
Unfortunately today many dealers use the term "D" block to make you think the gem is of finer quality. Unless you buy the gem from the mine, as we do, there is no way to be sure it is from "D" block. Keep in mind that all material from "D" block is not always of superior quality and the term is often used to deceive.
D block produces all qualities of material from the lightest colors to top gem material. In general what I have seen of D block material, the third color yellow is purer with less undesirable green.
Tanzanite is the blue to violet form of zoisite. Other colors are known. Tanzanite is a mineral species belonging to the epidote group.
Tanzanite crystallizes in the orthorhombic system. Vanadium is the cause of the color in blue to violet stones.
It has similar durability to amethyst, tourmaline and garnets. Tanzanite can be worn in all types of jewelry. Rings should be worn with some caution. Hardness deals with scratching the surface and scratches can be removed with minor lose to the gem.
In general both are similarly priced as it is the depth of color and quality of the color that matters. Originally the blue was considered more valuable because early sellers were comparing it to sapphire. Today the deep blue violet mixed color is what is in demand which is fortunate as straight blue tanzanite is more rare.
Pure violet with very little blue is even more rare as are pinks, greens and yellows. The term precious stems from a time when only the most expensive gems were called precious. Diamond, ruby, sapphire, emerald and pearl. All the other gems were of low value so therefore semi-precious. Most gem dealers have dropped the term for many stones as the value of many colored gems has skyrocketed.
There are no tanzanite synthetics. A synthetic tanzanite would hve the same chemical make-up of tanzanite a silicate of calcium and aluminum. There are many imitations including synthetic forsterite and synthetic sapphire. Tanzanite does have a color shift and rarely a color change.
Tanzanite: This gemstone is generally more expensive than other blue gems, such as the blue topaz and aquamarine. However, in comparison to the blue sapphire, the tanzanite is certainly more affordable.
Popularity Blue Sapphire: Revered for centuries and associated with aristocracy and royalty, this precious gem is undoubtedly much more popular than the tanzanite. Tanzanite: Limited availability and a stunning violet-blue hue have together made the tanzanite one of the most sought-after precious gems. Which One Should You Choose? Related posts. How Are Fire Opals Formed? Read more. However, in every other way, these two stones are very different from each other. Blue sapphire.
See this gemstone here. Sapphire is a very popular gemstone that has been valued and used in jewelry for centuries. It has been associated with the upper echelons of society, including Royals and the clergy. Sapphire is made of the mineral corundum and is found in only a few regions in the world, with some of the most famous sapphire mining locations being Sri Lanka, Burma and Kashmir.
Gem quality blue sapphire is quite rare. Stunning tanzanite bracelet by Delarah. See more tanzanite bracelets here. Shopping from Delarah? Tanzanite, on the other hand, is a new gemstone. It was discovered relatively recently, in the sixties, and named after the country it was found in — Tanzania.
Tanzanite is made of the mineral zoisite and is extremely rare in nature. While tanzanite does not have the long and glamorous history of sapphires, it has quickly established itself as one of the top ten bestselling colored gemstones. Winner of this round: We vote sapphire for its long and renowned history. In case you were wondering, both these gemstones are much rarer than diamonds.
Gem quality blue sapphires are rare in nature and extremely in demand. However, the natural supply of sapphires is much more abundant than those of tanzanite. If you take affordability into consideration, a tanzanite will certainly not drain your pocket the way a high-quality sapphire can. Even though a tanzanite is much rarer than a sapphire, the latter is more expensive because of its beauty and eternal association with royalty.
The sapphire is also exceptionally durable which further works in its favor and makes it a popular choice for wedding jewelry and engagement rings. This gem is also extremely rare and found only in one place on earth — the foothills of Mt.
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