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black diamond necklace
Skip itA small market ($12K/yr) — this niche doesn't clear our bar today.
Avg price
Great$56.42avg listing price — sweet spot $15–$100
Brand share
Great47%top-5 brand share — no brand owns this niche
Competition
Great38%top-5 click share — an open shelf
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Review moat
Good1,083.81avg incumbent reviews — the moat a new listing must climb
Returns
Bad6.7%return rate — above 5% kills the launch gate
Growth
Bad-22.2%90-day search growth — must beat 0% to launch
Price range
Bad$7.96–$1104.93cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Bad$12K$12K/yr · 76K searches
Conversion
Bad0.3%search→purchase rate — share of searches ending in a sale