The most valued color for a topaz is orangey-pink (an example being the imperial topaz from Brazil). Heat treatment is common for yellowish stones, with light blue or colorless stones being subjected to x-ray treatment and heating. Very big, clean crystals are common. Topaz prices subject to noticeable variation due to fashion trends on local markets.
The figures are based on Gemval's aggregated valuation statistics for the retail market. Irrelevant, controversial or repeat data are excluded from our analysis wherever possible. The figures are updated monthly.
Occurrence is represented in % for different weight categories.
Occurrence is represented in % for different value intervals.
Occurrence is represented in % for different clarity grades.
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