can you use this to take scratches out of glass?

Yes, this diamond polishing paste can remove scratches from glass. I would use 14,000 grit or 40,000 grit with polishing wheel on a dremel tool. The process will not be quick especially if the scratch is deep.

Is this like with thermal paste we get a tiny bit of paste in a laege tube but with the plunger almost all the way in?

I would say no. Since i have ordered this product and used this product. The syringes you get are pulled almost to the very top and the paste is there. Push the plunger and you get a little bit out. You still have more to use. As far as i can tell from what i have used, plungers are full almost to the top. For me was good value for the money.

can this be used for final polish on a sapphire, ruby type gemstone?

For your project, I would recommend you to use some professional power tools like a faceting machine with a diamond polishing disc instead of using diamond polishing paste for a better result.

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Tryuunion Diamond Polishing Compound, 5 Piece Lapping Paste 1500 to 80000 Grit, Lapping Compound Kit for Jewelry, Metal, Ring, Gemstone, Glass, Coin, 0.25 to 14 Micron, 5 Gram

Product ID: 315070775

Details

Brand
Tryuunion
Grit material
Diamond
Grit type
Fine
Item dimensions L x W x H
17.3 x 2.5 x
Material
Diamond

💎5 precision diamond grits (1500 to 80000)

🔧Versatile on metal, glass, gems & more

⚙️Oil-based formula for ultra-smooth polishing

Description

💎 Elevate your shine game—because your projects deserve perfection.

COMPACT ORGANIZED - Neatly packed in a durable box for on-the-go professionals.
PRECISION GRIT RANGE - From 1500 grit stock removal to 80000 grit mirror finish—flawless shine guaranteed.
MULTI SURFACE MASTERY - Polish jewelry, coins, glass, metal, and even knives with one kit.
OIL BASED DIAMOND PASTE - Smooth application with easy cleanup—no streaks, no hassle.
READY TO USE CONVENIENCE - Pre-filled syringes with 5g paste each—just apply and shine.

Tryuunion’s 5-piece diamond polishing compound kit features oil-based pastes ranging from 1500 to 80000 grit, designed for professional-grade polishing on jewelry, metal, glass, and more. Each 5g syringe delivers smooth, streak-free finishes with versatile application and easy cleanup, making it the ultimate tool for flawless surfaces.

Specifications

ASIN	B0926VFD1L
Best Sellers Rank	110,169 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 94 in Polishing Compounds
Brand	Tryuunion
Compatible Material	Aluminum,Paper,Glass,Metal,Leather
Customer Reviews	4.5 4.5 out of 5 stars (426)
Grit Material Type	Diamond
Grit Number	1500
Grit Type	Fine
Item Dimensions	17.3 x 2.5 x 1.5 centimetres
Item Weight	18 Grams
Manufacturer	Tryuunion
Manufacturer Part Number	Tryudpc5801
Material	Diamond
Model Number	Tryudpc5801
Number of Items	5
Number of Packs	1
Set Name	Tryuunion 5-Piece Diamond Polishing Compound Set
Unit Count	5.0 count

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Fantastic experience overall. Will recommend to friends and family.

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The product exactly matches the description. Very satisfied with my purchase.

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