Custom Cremations · Do-This List

Practice material — exactly what to buy, and where to get the real thing

Bone meal is the wrong material and that's why the pearls and orbs finish poorly. Below: the exact products to order (with links and a ~$35 total), how to mix them to match cremains texture, and named local pet crematories — with phone numbers — to source real pet cremains from.


Why bone meal fights you

Real cremated remains are calcined bone — bone fired hot enough (~1,400–1,800°F) to burn off everything organic, leaving only the mineral (calcium phosphate), then ground to a coarse, sandy grit. Off-white to gray, dry, inert.

Bone meal still carries protein, fat, and moisture. It's greasy and biologically active, so it fights the resin — discoloring, staying tacky, reading wrong in the bead. You've been fighting the medium, not your technique. The fix is to switch to the pure mineral (bone ash) and give it the right texture.

What to buy

Two ingredients plus one tool: a fine calcium-phosphate flour (pottery bone ash — same mineral as real cremains) as the body, and a coarse white calcium grit to give it the speckled, sandy texture. You blend them yourself. Total kit ≈ $35.

ItemProductSize~PriceWhere
Base — bone ash (buy this)The Ceramic Shop — Bone Ash (Natural), Di-Calcium Phosphate (real calcined bone, fine flour)buy 5 lb~$2.40/lb · ~$12/5 lbtheceramicshop.com
Base — backup (whitest)Seattle Pottery Supply — Tricalcium Phosphate (Bone Ash), synthetic1 lb / 5 lb$13.60 / $55.58seattlepotterysupply.com
Grit / texture (buy this)Manna Pro — Crushed Oyster Shell for Chickens (white calcium carbonate, coarse ~1–4 mm, inert)5 lb bag~$7amazon.com
Grit — backup (whiter)White Marble Chips (crushed calcium carbonate)small bag~$10–15amazon.com
Sizing toolCuisinart CTG-00-3MS stainless fine-mesh strainer set (3 sizes)3-piece~$15amazon.com

Why oyster shell, not "poultry grit": generic poultry grit is crushed granite — gray and glassy. Oyster shell is white-to-cream calcium carbonate, the right color family, already crushed to a coarse-sand grade. Cheapest correct-color grit off the shelf.

How to mix it

  1. Grade the grit first. Pour the oyster shell into the coarsest strainer over a bowl and shake. Anything too big (>~2 mm shell flakes) gets set aside or hand-crushed. Then sift what's left through the finest strainer to drop out the dust. Keep the middle fraction — grains roughly 0.5–2 mm. (One kitchen fine-mesh strainer works too: what stays on top is your grit, what falls through is dust you toss.)
  2. Start at 80/20 by volume — 4 scoops bone-ash flour : 1 scoop graded grit. Measure by scoop, not scale (the two have very different densities). Mostly-fine body with clearly visible speckle — what coarse-ground cremains look like.
  3. Dry-mix flour and grit thoroughly before any resin touches it, so the grit stays evenly suspended.
  4. Tune it. More grit = coarser feel, heavier speckle; less = smoother and chalkier. Make three test mixes — 85/15, 80/20, 70/30 — and cast a pearl from each to pick the look you want to standardize.
  5. Mix into resin as usual. Keep your current medium-to-resin ratio (~227 g medium per batch, ~33 g / 2 in pearls). The grit is still calcium filler by volume — it doesn't change your resin math.

How much to buy

This blend is your practice / technique medium — for dialing in mix ratio, forming, and finish. When you move to real material, you swap in donated pet cremains at the same volume; handling, resin ratio, and forming stay identical.

Where to get real pet cremains — local, with numbers

These are real pet crematories in your area (Marietta / Cobb / Metro Atlanta). Call the Call first ones — they're cremation-focused, so you're not a competitor. Ask whether they'll let you have unclaimed / communal cremains they'd otherwise scatter, or set up owner-consented donations, for product R&D — you'll sign a simple release and cover their handling. Keep it a donation, not a purchase.

Honor My Pet Crematory Call first
(404) 863-6409
4494 Acworth Industrial Dr, Suite 104, Acworth GA 30101 · family-owned 30+ yrs, serves Marietta within 30 mi · honormy.pet
Faithful Companion Pet Cremation Call first
(770) 470-2270
590 Commerce Park Drive SE #112, Marietta GA 30060 · cremation-focused · faithfulcompanion.com
Atlanta Pet Cemetery & Crematory Call first
(770) 333-3332
4964A S Atlanta Rd SE, Atlanta GA · established cemetery + crematory, likely holds unclaimed remains
Paws, Whiskers & Wags Also a competitor
(404) 990-2595
2256 Northwest Parkway SE, Suite C, Marietta GA 30067 (24 hr line 404-609-1072) · biggest in metro Atlanta, but also sells its own keepsakes — worth a call, may be guarded · pawswhiskersandwags.com
Pet Angel Memorial Center (Deceased Pet Care) Also a competitor
Locations in Austell (Cobb), Chamblee, Bethlehem · full-service incl. keepsakes · georgia.petangelmemorialcenter.com

What to say when you call: "I run a Georgia memorial-keepsake company, Custom Cremations. I'm developing a product and need practice material that behaves like real cremated remains. Would you be open to donating unclaimed or communal pet cremains you'd otherwise scatter — or arranging owner-consented donations — for R&D? I'll sign a release and cover your handling." The cremation-only shops are your best odds.

Optional: the higher-fidelity route (needs a kiln)

If you get kiln access, you can skip the grit-blend and make a near-exact analog: take clean, degreased butcher/soup bone, calcine it to bisque temperature (~1,650–1,830°F / cone 08–04) until chalk-white, cool, then grind and screen to a coarse-sand grade. That gives real calcium-phosphate grains in the exact color and texture of processed cremains — no carbonate grit needed. More work; keep the bone-ash-plus-oyster-shell blend as your default and treat this as an upgrade.

Sources

Bone ash / tricalcium phosphate — The Ceramic Shop · Seattle Pottery Supply · Digitalfire (chemistry)
Cremains composition & process — A Good Goodbye · Cremation.green
Local crematories — Honor My Pet · Faithful Companion · Paws, Whiskers & Wags · Atlanta Pet Cemetery