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
According to Flapen's Amazon United States niche tracking, black diamond necklace is a $12K/yr Amazon United States market (76K searches/yr). The top 5 brands hold 47% of demand. Demand peaks in Nov–Dec. Verdict: Skip it — 41/100.
Data updated Jul 12, 2026 · scored weekly · How we score niches
black diamond necklace market data
- Units sold / yr
- 500–750
- avg 0–100/product
- Revenue / yr
- $28K–$42K
- units × avg price
- Conversion rate
- 0.3%
- Avg BSR
- #7,038
- Page quality
- 0%
- Prime
- 98%
- Sponsored
- 77%
- Out of stock
- 3.4%
- Avg brand age
- 45 months
- Avg seller age
- 179 days
Competition & brand share
Clicks spread well past the top 5 (38% combined) — an open shelf where new products get seen.Brands
37 falling
Sellers
47
Top-5 brand share
47%
Top 20: 87%
Top-5 click share
38%
Top 20: 77%
Open market
53%
- JAKAWIN10%
- Rosec Jewels10%
- chaoyite8%
- JUNVirtuous8%
- Halukakah6%
- OYOGAA6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -22.2% search growth over the last 90 days.Peak months: Nov, Dec · busiest ÷ quietest = 3.3×
Top black diamond necklace search terms
- black diamond necklace45K/yr
- black diamond jewelry13K/yr
- black diamond necklace for women11K/yr
- black diamond jewelry for women7K/yr
Top black diamond necklace products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Rosec Jewels Certified 6 Carat Lab Grown Black Diamond Statement Necklace Aaaa Quality Black White Necklace - Fine Jewelry For Women 925 Sterling Silver With Chain
Rosec Jewels$113.794.4★3 rev
JAKAWIN Silver Rhinestone Jewelry Set Wedding Necklace Earrings for Women
JAKAWIN$13.714.3★1,682 rev
chaoyite Wedding Jewelry Set for Women Bridal Floral Necklace Dangle Earrings Bracelet Set Crystal Prom Party Costume Accessories for Bride (black crystal)
chaoyite$20.394.4★87 rev
JUNVirtuous 2 Pieces Cuban Link Chain for Men - Diamond Necklace and Bracelet Iced Out Miami Hip Hop Jewelry (Black 8 and 18 Chain)
JUNVirtuous$16.804.2★380 rev
Halukakah Gold Chain for Men Iced Out 14MM Rhodium Black Plated Diamond Cuban Link Chain Necklace 24 Lab Dimaonds Prong Set Gift for Him
Halukakah$20.374.0★5,381 rev
Newest
by launch date
PINCHUAN Silver Choker Necklaces for Women Rhinestone Choker Diamond Choker Necklace Womens Silver Prom Necklace Sparkly Crystal Rhinestone Choker for Prom Party Jewelry Gift-black/LX
PINCHUAN$8.0952 rev
JAKAWIN Silver Rhinestone Jewelry Set Wedding Necklace Earrings for Women
JAKAWIN$13.711,682 rev
Rosec Jewels Certified 6 Carat Lab Grown Black Diamond Statement Necklace Aaaa Quality Black White Necklace - Fine Jewelry For Women 925 Sterling Silver With Chain
Rosec Jewels$113.793 rev
Unicra Rhinestone Bridal Wedding Jewelry Sets Black Necklace Earrings Bracelet Ring Set Prom Formal Costume Jewelry Set for Women and Brides (Black)
Unicra$13.0824 rev
LOCIBLO Birthstone Necklaces for Women 925 Sterling Silver Infinity Pendant Black Cubic Zirconia Necklace Jewelry for Her 16+2
LOCIBLO$51.31487 rev
Trending
90-day click momentum
Unicra Bride Crystal Necklace Earrings Set Black Jewelry Sets Rhinestone Choker Necklace Prom Costume Jewelry Set for Women and Brides (Black)
Unicra$11.884.4★
SAVEARTH DIAMONDS Round Cut Lab Created Black Moissanite 5MM Width Tennis Chain Necklace For Men Women In 14K Black Rhodium Plated 925 Sterling Silver (VVS1 Clarity 40.15 CT) Length - 20
SAVEARTH DIAMONDS$1104.933.4★
JUNVirtuous 2 Pieces Cuban Link Chain and Bracelet - Iced Out Miami Cuban Hip Hop Jewelry (Black 8 and 20 Chain)
JUNVirtuous$17.784.2★
Rosec Jewels Certified 6 Carat Lab Grown Black Diamond Statement Necklace Aaaa Quality Black White Necklace - Fine Jewelry For Women 925 Sterling Silver With Chain
Rosec Jewels$113.794.4★
chaoyite Wedding Jewelry Set for Women Bridal Floral Necklace Dangle Earrings Bracelet Set Crystal Prom Party Costume Accessories for Bride (black crystal)
chaoyite$20.394.4★
What buyers say about black diamond necklace
What buyers praise and complain about, mined from review topics.What buyers love
“Good deal”
“fits great for her”
“Elegant costume jewelry”
“ELEGANT”
“Overall, its a really pretty piece of jewelry and definitely worth considering if you want something elegant and not over the top — especially if youre buying it as a gift because it clearly made a good impression”
“The chain length is good”
“Sparkly”
“Just as described”
“Its light and you barely even notice youre wearing it”
“Pretty”
What buyers complain about
“Low Quality”
“Broke”
“The chain is a little short for my liking”
“Sad because it was pretty just not sturdy”
“way overpriced for the crummy quality”
“Wore during my wedding and loved them, however a gem did fall off”
“The clasp is not my favorite”
“A bit hard to put on”
“Only thing that irritated me was the rain got stuck to everything”
“However, it was the wrong color and defective”
Top return reasons
Common questions
- Is black diamond necklace profitable to sell on Amazon United States?
- The niche generates $12K/yr across 48 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is -22.2%. Flapen's verdict: Skip it (41/100).
- How competitive is the black diamond necklace niche?
- 37 brands and 47 sellers compete. The top 5 products take 38% of clicks and top 5 brands hold 47% of demand.
- What do buyers complain about in black diamond necklace?
- Top complaints mined from reviews: Quality-Overall, Durability, Size-Overall. The return rate is 6.7% — above our launch gate.
- When does demand for black diamond necklace peak?
- Demand peaks in Nov–Dec; the busiest month runs 3.3× the quietest.
- What does it cost to enter the black diamond necklace niche?
- Listings span $7.96–$1104.93; the average listing price is $56.42 (sweet spot $15–$100). The average incumbent carries 1,084 reviews — the moat a new listing must climb.