Gemology Hub | Gemstone & Mineral Identification Guides

Black colour could occur amongst any diamond type (Ia, Ib, IIa, IIb) Most natural diamonds are non-magnetic. However, very rarely, a natural diamond can be attracted by a magnet. This occurs when the diamond contains numerous and/or large inclusions of minerals such as pyrrhotite, magnetite, or native iron etc. Related articles The Pink Diamond of Iran " The Great Table Diamond" Worldwide Gemological Laboratories Contact Information What is Mohs Scale? Further reading Natural Fancy Black Diamond

Exploring The Uniqueness Of Triple X Diamonds: What Makes This Cut So Special? The term "triple X diamond" refers to round brilliant diamonds that have been assessed Excellent cut, Excellent symmetry, and Excellent polish by the GIA. Because X stands for Excellent, Triple X simply implies Triple Excellent. The cut, symmetry, and polish grades of a diamond demonstrate the level of craftsmanship that went into turning a rough diamond into a polished stone. All three affect a diamond's light interaction and are graded Excellent, Very Good, Good, Fair, and Poor on GIA Diamond Grading Reports. Many diamond purchasers look for Triple Excellent diamonds because they desire the greatest craftsmanship possible. A diamond's top-notch craftsmanship guarantees that it emits the most light and fire while also having a pleasing pattern. What does it mean to have an excellent cut? The most significant aspect of a diamond is its cut. It influences the dimensions of a diamond, such as...

  2008.6.20 Paraiba Neon Blue Copper-Beryl: A Revolutionary New Synthetic Beryl Discovered By Japanese Researchers A Japanese research gemological laboratory published a report dated 20th June 2008, Author Dr. Ahmadjan Abduriyim about the new type of synthetic beryl whose color resembles Paraiba neon blue copper-bearing tourmaline. For further details kindly visit the following website https://grjapan.ddo.jp/gaaj_report/2008/2008_06-2en.html With regards  HUK

An In-Depth Look At Unakite Rock Under A Gemological Microscope Unakite is first discovered in the United States . The Unakas mountains of North Carolina . Unakite is an changed granite consists of pink orthoclase feldspar , green epidote , and generally colorless quartz . It exists in various shades of green and pink and is usually mottled in appearance. In good quality unakite is considered a semiprecious stone , will take a good polish and is often used in jewelry and other lapidary work such as eggs, spheres and other carvings like animals.  Related articles Mimetolith Topographic on chert Quartz What is Mohs Scale?

Astonishing Beauty: Observing Pakistani Topaz With Triplite Inclusions Under The Microscope "Topaz is a silicate mineral of aluminium and fluorine and orthorhombic crystal system. Drop-shaped cavities with two or three unmixed liquids are seen in certain topaz (three-phase). Cubic crystals may be found in white topaz from Nigeria, Africa. Mica, spessartine garnet, monazite, quartz, monzonite, limonite, fluorite, albite, and brookite are solid minerals found as inclusions. Rutilated topaz is a trade name for needle-like inclusions of limonite-stained etched dislocation channels or voids in Brazilian topazes. Triplite(Mn,Fe++,Mg,Ca)2(PO4)(F,OH) in topaz is an exceptionally uncommon phosphate mineral with unique inclusions, and the best location is Braldu Valley, Skardu District, Gilgit-Baltistan, Pakistan. Drop-shaped cavities with two or three unmixed liquids are seen in certain topaz (three-phase). Cubic crystals may be found in white topaz from Nigeria, Africa. Mica, spessa...

Laurentthomasite is a mineral that was recently approved by the International Minerals Association (IMA) in 2019. It's appealing not only as a newly discovered mineral, but also as an excellent translucent and attractively coloured gemstone. We might be able to test some samples in the coming days. I'd like to share our calculated  property with you. The basic gemmological property 　Theoretically is R.I. is 1.540-1.545 (uniaxial +) but our tested samples showed 1.555-1.560 (uniaxial +). The S.G is about 2.67. The crystal system is hexagonal. And it shows strong pleochroism as blue and yellow. The hardness is about 6.       Laurentthomasite   Related articles Diaspore, the new addition in Afghanistan minerals (Raw Diaspore) Garnet group , Types of Garnet and its identification Techniques. What is Mohs Scale?

 Weights Frequently Used in the Gem Trade           1 Carats = 100 Cents   1 Carats = 0.200 Grams 1 Carats = 200 Milligrams 1 Grams = 5 Carats 1 Tola = 11.664 Grams 1 Tola = 59.32 Carats 1 Ratti = 0.91 Carats 1 Grain = 0.25 Carats 1 Momme = 3.750 Grams 1 Momme = 18.75 Carats   1 Carats = 4 Grain Pearl 1 Ratti = 0.91 Carat ...

                 Deep-Earth Diamond Contains a New Mineral The unexpected discovery of calcium silicate perovskite, a mineral never before seen in nature, has opened a window into the mysteries of the Earth's mantle. Found at depths of 660 to 900 kilometres below the planet's surface, the mineral can only form under extreme pressure. This finding has the potential to revolutionize geologists' understanding of the mantle's influence on plate tectonics. Though the mineral had been created in the laboratory at a pressure of 20 gigapascals, it reverted to a different form when removed from the artificial environment. This led researchers to believe that discovering naturally occurring calcium silicate perovskite from the mantle would be nearly impossible. As Oliver Tschauner of the University of Nevada, Las Vegas, explains, "We believed the chances of discovering it were so slim that we never actively sought for it." However, this remarkable disc...

TOPAZ The meaning of Topaz is to seek, to search or fire. (The  state gemstone  for the US  state  of Utah.) Chemistry: Aluminum fluo-silicate - A1 2 (F, OH) 2 SiO 4   Crystal system and habit: Orthorhombic: Usually found as elongated prisms with a  rhomb - shaped cross section. The prisms will frequently show  vertical striations . Also found as rolled pebbles. orthorhombic Topaz crystal system  orthorhombic Topaz crystal system  orthorhombic Topaz crystal system  Topaz crystals with faceted topaz  Pink Topaz lot from Katlang, Mardan, KPK, Pakistan  Pink Topaz lot from Katlang, Mardan, KPK, Pakistan  Topaz crystal Pink Topaz from Katlang, Mardan, KPK, Pakistan  Varieties : Transparent to translucent. •    Topaz (use with color prefix)-colorless Yellow to orange ('sherry' brown)  and brown Orange topaz , the state gemstone for the US State of Utah • ...