" I found this in G&G, Fall 1988. It shows two Sagenitic stones. The one on the left is fluorite and the oval is quartz. And yes….the fluorite stone looks just like rutilated quartz. But by doing some standard tests, it’s easily identified as fluorite."
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"Saya menemukan ini ( artikel ) di G & G, Fall 1988. Ini menunjukkan dua batu Sagenitic. Yang di sebelah kiri adalah fluorite dan oval adalah quartz. Dan ya ...batu fluorite terlihat seperti rutilated quartz. Tapi dengan melakukan beberapa tes standar, itu mudah diidentifikasi sebagai fluorite"

"SAGENITIC Stones
A pair of near-colorless sagenitic stones (figure 12) were loaned to the East Coast laboratory for examination. A sagenitic material is one that contains long acicular inclusions, usually tourmaline but sometimes other minerals, such as actinolite.The crystal habit, extreme dichroism, and refractive index (measured where they reached the surface) of the coarse needles in these stones proved that they were indeed tourmaline.
Although the two stones are similar in appearance, except for a slight difference in luster (exaggerated in this photograph), routine gemological testing proved that the oval stone is quartz, while the antique cushion cut is fluorite. Not only is sagenitic fluorite unusual, but the fact that the appearance of this specimen resembles quartz, despite its low hardness and refractive index, is ,also a testament to the careful faceting of this stone and its subsequent lack of wear.

Clayton Welch
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"Batu SAGENITIC
Sepasang batu sagenitic berdekatan-tidak berwarna (gambar 12) yang dipinjamkan ke laboratorium Pantai Timur untuk pemeriksaan. Bahan sagenitic adalah salah satu yang mengandung inklusi panjang acicular, biasanya turmalin tapi kadang-kadang mineral lainnya, seperti actinolite. biasanya kristal, dichroism ekstrim, dan indeks bias (diukur di mana mereka mencapai permukaan) jarum kasar yang muncul dipermukaan batu-batu ini membuktikan bahwa mereka memang turmalin.
Meskipun dua batu yang mirip dalam tampilannya, kecuali sedikit perbedaan dalam kilau (berlebihan dalam foto ini), pengujian Gemological rutin membuktikan bahwa batu oval adalah quartz sedangkan potongan cushion antik adalah fluorite.
Tidak hanya fluorite sagenitic tidak biasa, tetapi kenyataan bahwa penampilan spesimen ini menyerupai quartz, meskipun kekerasan yang rendah dan indeks bias rendah, adalah, juga bukti faceting batu ini harus berhati hati serta kurangnya dipakai.

Clayton Welch

"The shot you send it from G&G, Fall 1988 p.173.Both stones are Sagenitic. The one on the left is fluorite and the stone on the right is quartz. So, the correct terminology for the two would be sagenitic fluorite and sagenitic quartz. You will also see in that Lab Note that “A sagenitic material is one that contains long acicular inclusions, usually tourmaline but sometimes other minerals such as actinolite.” Those needles shown in the picture were tourmaline. Here’s what they did to identify them: “The crystal habit, extreme dichroism, and refractive index (measured where they reaced the surface) of the course needles in these stones proved that they were indeed tourmaline.”
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foto Anda kirimkan dari G & G, Fall 1988 p.173. Kedua batu adalah Sagenitic. Yang di sebelah kiri adalah fluorite dan batu di sebelah kanan adalah quartz. Jadi, terminologi yang tepat untuk keduanya adalah sagenitic fluorite dan sagenitic quartz. Anda juga akan melihat bahwa Lab mencatat "Bahan sagenitic adalah salah satu yang mengandung inklusi acicular panjang, biasanya turmalin tapi kadang-kadang mineral lain seperti actinolite." jarum disana yang ditunjukkan pada gambar adalah turmalin. Inilah yang mereka lakukan untuk mengidentifikasi mereka: "Kebiasaan kristal, dichroism ekstrim, dan indeks bias (diukur di mana mereka mencapai permukaan) dari jarum saja di batu-batu ini membuktikan bahwa mereka memang turmalin.

Tips

cara membedakan fluorite dan quartz menurut yang saya dapatkan adalah dengan metode scratch.
1. maksudnya apabila kita menemukan fluorite dan quartz, mungkin kita bisa menggoresnya dengan jarum / silet. dikarenakan kekerasan fluorite 4-5 dan silet atau jarum 5,5. jadi seharusnya fluorite akan mudah tergores.
2. menggoreskannya pada kaca cermin. quartz bisa menggores kaca. sedangkan fluorite seharusnya tidak bisa.

If you don’t have any tools, you can use the visual look of the gemstones to try and differentiate them. This is only an estimation technique and proper testing should be carried out. Quartz has a nice sparkle but Topaz often reflects yellows and blues like a diamond, that is why it is described as silver at times, the shine and sparkle are totally different from Quartz.

Most quartz is normally translucent and may have some sparkle but Topaz has been used as a substitute for diamonds for many years.

If you place some nice high quality topaz beside some translucent quartz, it will help you in being able to tell the difference. The eye will catch the beautiful colors irradiating from the topaz whereas the quartz will just shine with light and not really reflect multiple yellows and pinks and so on.