KARATZ (@-karatz6823), a gemstone-focused channel from Japan, posts gem identification, gem-cutting and stone-education videos with about 1,800 subscribers and a median of roughly 1,550 views per video. It uploads irregularly, about three videos a year, and most are long-form. Sponsored integration rate is estimated at $50 to $150 per video (view-based, minimum floor applies). Its distinctive detail is an illustrated gemstone encyclopedia series.
Japanese gemstone education channel with a loyal niche, best for jewelry brands.
- About 1,800 subscribers and a 1,550 median view count, with a 79,861-view peak video on gem cutting.
- Consistent educational format on gem identification and jewelry care suits product demos.
- Estimated sponsored rate $50 to $150 per video, well below typical paid CPM of $10 to $30 per 1,000 views.
Brand fit report
Content
- Formats
- educational explainer, how-to tutorial, product showcase
- Tone
- informative, calm
- Language
- Japanese
- On camera
- No, voiceover and b-roll
- Production
- Clean, lightly edited
- Typical length
- 1 to 7 minutes
Audience
Commercial
- Brands seen
- None yet
- Categories promoted
- gemstones, jewelry
- Affiliate links
- No
No sponsorship disclosures found in the last 50 videos; the channel promotes its own online store, KARATZ STORE, in video descriptions.
Suitability GARM Brand Safety Floor + Suitability
Family friendly
Content is educational gemstone and jewelry care with no concerning titles in the recent 30 videos.
We classify content, never people. No age, gender, ethnicity, religion or political views are inferred about the creator. Audience figures are estimates unless marked verified. Creators can correct anything on their profile.
Platforms
Benchmark score: 52 / 100
Public rule, same for everyone. How it works.
Recent videos
▶基本はコレだけ！宝石専門店が教える黒ずみ・変色を防ぐシルバージュエリーのお手入れ＆保管方法 · 163 views
▶お家で簡単！指輪サイズの測り方 · 1.2k views
▶プロが教える！宝石道具の使い方とコツ～宝石鑑定用ルーペ編～ · 436 viewsLast three uploads, latest 31 days ago.
カラッツ公式Youtubeチャンネル。宝石鑑定士が鑑定した世界の石を紹介します。 💎宝石専門通販サイト｜カラッツSTORE https://store.karatz.jp/ 💎日本最大級宝石専門情報メディア｜カラッツGem Magazine https://karatz.jp/ も好評展開中！ ▼各種SNSも随時更新中！良かったらチェックしてみて下さい▼ カラッツ公式Twitter：https://twitter.com/karatz_official カラッツ公式instagram：https://www.instagram.com/karatz_official/ カラッツ公式Facebook：https://www.facebook.com/karatz.jp
About カラッツ公式 - KARATZ
KARATZ (@-karatz6823) is a Japanese YouTube channel run by the gemstone brand KARATZ, which publishes gemstone education and jewelry care content. The channel posts primarily long-form explainers on gem identification, gem cutting, and jewelry maintenance, along with a recurring illustrated gemstone encyclopedia series. Per the channel's website, KARATZ is a gemstone retailer and information medium, and its content is produced by gemstone professionals. Audience figures are estimates: viewers are likely Japanese adults interested in gemstones and jewelry, with a balanced gender mix.
The channel uploads infrequently, with roughly three videos in the past year, and its median view count is about 1,550. Sponsorship history is absent, so any integration would be a first-time deal. Based on its size, a sponsored video is estimated at $50 to $150, which compares to a paid CPM of $10 to $30 per 1,000 views. Brands in jewelry or gem retail who want a focused Japanese audience should consider this channel.
Written from カラッツ公式 - KARATZ's public YouTube profile, platform data and web mentions. Numbers updated 2026-10-19. カラッツ公式 - KARATZ can edit or remove this page at any time.
Questions about カラッツ公式
How much does KARATZ charge for a sponsored video?
KARATZ has no recorded sponsorships, so no published rate exists. Based on a median of about 1,550 views on long-form videos, a sponsored integration is estimated at $50 to $150 per video. Rates are negotiated directly with the channel.
What does KARATZ post about on YouTube?
KARATZ posts gemstone education, including gem identification, how to use gem tools such as loupes and tweezers, gem cutting demonstrations, and jewelry care tips. It also runs an illustrated gemstone encyclopedia series with stone-by-stone explainers in Japanese.
How do I contact KARATZ for a brand deal?
Contact details unlock on Starbooked for $0.80. Creators with a boosted profile can be booked through Starbooked directly.
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