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black tourmaline
Worth a lookShows low returns (1.1%), but a small market ($39K/yr) keeps it on the watch list.
Returns
Great1.1%return rate — above 5% kills the launch gate
Review moat
Great300.39avg incumbent reviews — the moat a new listing must climb
Brand share
Great58%top-5 brand share — no brand owns this niche
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Competition
Good41%top-5 click share — leaders hold, buyers still browse
Price range
Good£3.56–£27.67cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Okay3.2%search→purchase rate — share of searches ending in a sale
Avg price
Okay£8.92avg listing price — sweet spot $15–$100
Growth
Bad-4.6%90-day search growth — must beat 0% to launch
Market size
Bad£39K£39K/yr · 139K searches
Signals Low Review Barrier