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The parts of the crystals, which are colorless or have lesser color, are removed by knocking the crystals. Leaving only the tip of the crystal, this part used for grading. Sample : Ametyst Brazil, Citrine Brazil |
| Some stones only graded by inclusions,
no part are removed. Leaving at the end only clean or included goods.
The clean goods are used for grading. Sample : Rhodolite Garnet, Mozambique Garnet |
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| The worker sits under a
good light source. On bigger crystal when there are inclusions in some part, this part are sawed away, leaving the clean crystal for grading Sample : Peridot, Sapphire, White Topaz (before radiation) to party pre-form The rest is waste material or tumbled and sold as natural stones or used on products. |
