...APPENDIX TABLE A4. HELIODOR SAMPLE INFORMATION ...

... loss around 500 °C. Alkmim et al . (2017) observed the loss of color of a green beryl when it was heated to 600 °C. Platonov et al . (2016) found that heliodor beryl lost its color at 400 °C. The 450 nm UVCT tail from tetrahedral Fe 3+ ions is prominent in the yellow beryl of Solntsev...

...Fig. 2 Photographs of representative beryl from different zones of the Luumäki N pegmatite. (a) Common green magmatic beryl from the intermediate zone. (b) Altered pale-gray common magmatic beryl from the intermediate zone. (c) Gem-quality yellow–green (heliodor) beryl crystal from a miarolitic...

... is an elegant presentation by twenty-two authors on colorful varieties of beryl (including the varieties aquamarine, red beryl, morganite, emerald, goshenite and heliodor, in addition to the cyclosilicate species foursome noted above. Packed into the first 104 pages are contributions (the titles of which...

... , copyright GIA F igure 2 Group of gem crystals from granitic pegmatites. Left to right: spodumene (kunzite, California, USA, 284 g), spodumene (triphane, Afghanistan, 196 g), beryl (Heliodor, Ukraine, 303 g, 14 cm tall), tourmaline (Brazil, 25 g), beryl (aquamarine, Vietnam, 37 g), topaz (China...

... in Professor Sachanbi ski s works were multidisciplinary and often combined mineralogy, gemology, Professor Sachanbi ski. Elements 134 Beryl heliodor from Wolodarsk (Volhynia, Ukraine), crystal length c. 5 cm. Specimen from the collection of the Mineralogical Museum, University of Wroc aw. April 2024 ...

... with the polysynthetically twinned ‘ tough ’ diamonds from Australia, and for cutting these diamonds they demand higher wages! Section 2 is devoted to gemstones associated with pegmatites. Beryl group is dealt in Chapter 6. Different types of gem-beryls; emerald, aquamarine, heliodor, morganite and goshenite are found...

...Fig. 3. Absorption spectra under nonpolarized light. 1 – rosterite, 2 – aquamarine, 5, 8 – beryl,7 – goshenite (heliodor), 9 – morganite, 11 – emerald; black beryl: transparent (13a) and dark (13b) zones. Sample numbers follow Table 3 . ...

... chapter, Turner and Groat consider the non-emerald gem beryls – aquamarine and other varieties of beryl, such as morganite, heliodor and red beryl, as well as the more recently discovered pezzottaite and stoppaniite. The True Blue aquamarine occurrence in the Yukon is described as an example of gem beryl...

... is heliodore; and the colorless variety is goshenite . Hematite Fe 2 O 3 ; (Fig. 13) : Named from the Greek word “haimetites”meaning “blood-like,” a reference to the colour of the powdered mineral. Specularite or specular hematite is a variety of hematite that exhibits a flaky or sparkling...