---
title: "Products — diamond tester - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/diamond-tester/products"
last_updated: "2026-07-31T10:57:19.640Z"
locale: en
meta:
  description: "Niche score 50/100 · £50K/yr market · 54K searches/yr · £14.58 avg price. A small market ($50K/yr) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 50/100 · £50K/yr market · 54K searches/yr · £14.58 avg price. A small market ($50K/yr) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Products — diamond tester - Flapen"
---

# **diamond tester**

**Worth a look**

Shows beatable incumbent ratings (3.8★), but a small market ($50K/yr) keeps it on the watch list.

Market size 13Growth 13Conversion 70Competition 39Returns 45Price range 81Avg price 72Brand share 70Review moat 88Quality gap 98

**Quality gap**

**Incredible****3.8★**

avg incumbent rating — lower means beatable quality

**Review moat**

**Great****245.61**

avg incumbent reviews — the moat a new listing must climb

**Price range**

**Great****£6.35–£55.37**

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

**Avg price**

**Good****£14.58**

avg listing price — sweet spot $15–$100

**Conversion**

**Good****6.4%**

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

**Brand share**

**Good****63%**

top-5 brand share — brands hold most of the demand

**Returns**

**Okay****3.4%**

return rate — above 5% kills the launch gate

**Competition**

**Okay****61%**

top-5 click share — leaders hold, buyers still browse

**Market size**

**Bad****£50K**

£50K/yr · 54K searches

**Growth**

**Bad****-23.4%**

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

**Signals**[** Quality Gap**](https://flapen.com/research/niches?market=uk&signal=quality_gap "Avg rating < 4.0")