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60

black tourmaline

Worth a look

Shows low returns (1.3%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 51Growth 23Conversion 40Competition 85Returns 89Price range 81Avg price 57Brand share 88Review moat 75Quality gap 42

Returns

Great1.3%

return rate — above 6% kills the launch gate

Brand share

Great47%

top-5 brand share — no brand owns this niche

Competition

Great30%

top-5 click share — an open shelf

Price range

Great$4.81–$65.04

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Good514.82

avg incumbent reviews — the moat a new listing must climb

Avg price

Good$12.81

avg listing price — sweet spot $15–$100

Market size

Good$298K

$298K/yr · 729K searches

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Conversion

Okay3.2%

search→purchase rate — share of searches ending in a sale

Growth

Bad-4.0%

90-day search growth — must beat 0% to launch

Competition

Clicks spread well past the top 5 (30% combined) — an open shelf where new products get seen.

Brands

39 rising

Sellers

41

Top-5 brand share

47%

Open market

48%

  • Amazing Gemstone12%
  • LPBeads12%
  • BANANE LAB9%
  • SmileBelle8%
  • Erliway6%
  • TUBIANCA5%

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%3%$9K6%$18K9%$27K12%$36K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 60 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -4.0% search growth over the last 90 days.
20K15KSpike '24Spike '25Prime Day '25Holiday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Oct · busiest ÷ quietest = 1.6×

Reviews

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall25%

“Great value for the quality/price”

Size-Overall15%

“Good Size Honestly”

Advertised Vs Actual Product10%

“As described”

Value For Money8%

“Great for price”

Gifting Purpose5%

“perfect for - gift”

Durability5%

“Looks great held up nicely”

Color3%

“Bright colors”

Comfort-Overall3%

“comfortable”

Design-Overall2%

“Beautifully crafted, love mine”

Ease Of Use2%

“very convenient for them”

What buyers complain about

Size-Overall24%

“Small in size”

Durability19%

“didnt last”

Quality-Overall12%

“the lab are pretty low quality”

Advertised Vs Actual Product8%

“it was this deceiving one”

Color4%

“Color is off”

Value For Money3%

“Expensive”

Allergies2%

“chain is itchy”

Hard Feel2%

“Rough”

Strength2%

“It is flimsy”

Stretchability/Expandability/Elasticity2%

“Broke as soon as its stretched slightly”

Top return reasons

Size-Overall37%
Advertised Vs Actual Product17%
Quality-Overall8%
Durability6%
Defective Material/Parts4%
Wrist Fit4%
Color3%
Functionality-Overall2%
Stretchability/Expandability/Elasticity2%
Precious Gemstone2%