Selenite Gemstone: Nneɛma, Nkyerɛase, Dwumadi & Mfaso
Selenite aboɔden abo yɛ gypsum ahwehwɛ a ɛyɛ mmerɛw a wonim no sɛ ɛyɛ fɛ na ɛyɛ honhom mu ahotew tumi. Mpɛn pii no, saa ahwehwɛ yi yɛ nea enni kɔla, ɛyɛ fitaa, anaa fitaa.
Ɛnde, so gypsum ne selenite yɛ ade koro? Yiw ne dabi. Selenite yɛ gypsum bi, enti selenite nyinaa yɛ gypsum. Nanso, alabaster yɛ gypsum foforo a ɛda nsow wɔ selenite ho, enti ɛnyɛ gypsum nyinaa na ɛyɛ selenite.
Wɔhyɛ selenite ahwehwɛ no nso ho afahyɛ wɔ ne kɛse akɛse ho, na ɛka nea ɛsõ sen biara a wohu wɔ Asase so no ho. Wɔbɔ amanneɛ sɛ na nhwɛsode biako a wohuu wɔ Mexico no tenten bɛyɛ anammɔn 40 (mita 12)!
Sɛ ɛno anyɛ w’ani a, twɛn kɛkɛ. Wɔ saa asɛm yi mu no, yɛbɛhyɛ wo ma wɔ selenite ahwehwɛ su ahorow, ahorow, ne ayaresa a wɔde di dwuma a ɛma aboɔden abo yi yɛ nwonwa kɛse no nyinaa ho.
Ɛfa Selenite Ɔbo ho
Selenite yɛ aboɔden abo a ɛsom bo fã bi a ɛhyerɛn kakra a ɛma wɔtoo din “nsu hann.” Wɔsan frɛ no ɔsram bo, ɛwom sɛ ɛne ɔsram bo nni abusuabɔ de .
So selenite yɛ awo abo? Dabi, nanso ɛyɛ nsoromma mu hwɛ bo ma Taurus, Gemini, ne Kokoram. Selenite nso yɛ nsoromma bo ma, ɛnyɛ nwonwa sɛ, ɔsram!
Selenite Nkyerɛkyerɛmu & Su ahorow
Selenite nnuru a wɔde yɛ no ne CaSO4·2H2O, a ɛkyerɛ sɛ ɛyɛ calcium sulfate a nsu wom. On the Mohs mineral hardness scale , selenite gypsum ranks at a very low 2. Wɔ aboɔden abo akyi no, selenite mineral a wɔde di dwuma no yɛ nea mfaso wɔ so ma plaster, semɛnte, ne aduannuru.
Wɔtaa di mfomso bu selenite sɛ calcite . Wobɛyɛ dɛn ahu sɛ selenite yɛ nokware anaa?
Sɔhwɛ a ɛyɛ mmerɛw sen biara ne sɛnea ɛyɛ den, efisɛ selenite yɛ mmerɛw sen calcite. Nea ɛka ho no, selenite dodow bɛyɛ 2.3, bere a calcite dodow yɛ 2.71.
Ɛkame ayɛ sɛ selenites nyinaa yɛ nea ɛda adi, na ɛte sɛ nea ɛyɛ translucent kosi opaque nkutoo esiane inclusions , element impurities, ne abɔde mu anhwea a wɔde akata so nti.
Hwehwɛ selenite mineral ahoɔden nyinaa wɔ ase ha:
Mohs denden : 2; 3 (satin spar) .
Kɔla : Mpɛn pii no, enni kɔla, ɛyɛ fitaa, anaasɛ ɛyɛ fitaa; Ebetumi ayɛ kɔkɔɔ, kɔkɔɔ, bruu, anaa bruu esiane efĩ nti
Ahwehwɛ nhyehyɛe : Monoclinic
Luster : Ɛyɛ waxy anaa sub-vitreous, ɛte sɛ ahwehwɛ wɔ cleavage so; Silky (satin spar) .
Transparency : Ɛyɛ nea ɛda adi pefee kosi nea ɛnyɛ nea ɛda adi pefee
Nneɛma a ɛma hann yɛ hyew : 1.52-1.53
Nnipa dodow : 2.25-2.35
Cleavage : Ɛyɛ pɛpɛɛpɛ wɔ [010] so; Nsonsonoe/Ahoɔden wɔ [100] ne [011] so.
Fracture : Ɛyɛ nwansena anaasɛ ɛyɛ nhama
Streak : Ɛyɛ fitaa
Luminescence : Ɛtɔ mmere bi a, ɛyɛ phosphorescent; Mpɛn pii no, ɛyɛ fluorescent wɔ mfinimfini “hourglass” beae - mpɛn pii no tan anaa ahabammono a ɛyɛ hann wɔ LW-UV & SW-UV mu
Optical Nsunsuanso : Chatoyancy & “television ɔbo” nkɛntɛnso (satin spar) .
Selenite Ahorow Ahorow
Gypsum aboɔden abo tumi yɛ ahwehwɛ ahorow a wɔahyehyɛ. Wɔde selenite ahorow no din esiane ne nsusuwii ahorow a ɛyɛ fɛ na ɛyɛ soronko no bi nti. Ebinom kyekyɛ selenite mu wɔ ɔkwan soronko so fi nsusuwii afoforo no ho, nanso yɛbɛkyekyɛ mu wɔ selenite ase.
Nea edi kan no, dɛn ne anhweatam so rose selenite?
Anhweatam so Rose
Anhweatam so rose selenite yɛ ahwehwɛ akuwakuw a ɛyɛ kurukuruwa a wɔayɛ no sɛ rose nhwiren a ɛhyerɛn fi mfinimfini beae bi. Wohu ahwehwɛ no wɔ sare so, na anhwea pii wɔ mu ne nea atwa ho ahyia, ɛtɔ mmere bi a ɛte sɛ druze .
Mpɛn pii no, “nhwiren” no anoano yɛ nea ɛhyerɛn te sɛ ahwehwɛ anaa ahwehwɛ. Wɔn a ɛyɛ kɔkɔɔ a ɛyɛ rusty no hyerɛn a ɛyɛ kusuu.
Edin afoforo bi ne:
Gypsum Rose/Rosette a ɛyɛ fɛ
Selenite Rose na ɔkyerɛwee
Rose Rock, Ɔbotan
Sand Rose a wɔfrɛ no
Sahara Rose na ɔkyerɛwee
Barite nso betumi ayɛ anhweatam so rose nsusuwii anaasɛ ɛne anhweatam so rose selenite abɔ mu. Selenite anhweatam so roses anoano yɛ nnam, nanso barite anhweatam so rose ahwehwɛ no yɛ den sen saa.
Satin Spar a ɛwɔ hɔ
Satin spar yɛ ahwehwɛ a ɛyɛ hann, ɛte sɛ silika, na ɛyɛ nhama a ebia ɛyɛ fitaa te sɛ nufusu anaa peach na ɛyɛ ahwehwɛ a ɛte sɛ prism. Nhama a ɛwɔ mu no betumi ama ɔbo no ayɛ “ɔkraman aniwa” (chatoyancy).
Sɛ wotwitwa na wɔyɛ no fɛfɛɛfɛ a, satin spar nso bɛda “television ɔbo” nkɛntɛnso adi wɔ baabi a mfonini ahorow a ɛwɔ ɔbo no ase no te sɛ nea ɛwɔ n’anim!
Aboɔden abo ho animdefo pii bu satin spar sɛ gypsum ahorow abiɛsa no mu biako, sɛ selenite ne alabaster ka ho. Wɔ saa akwankyerɛ yi ho no, yɛde satin spar bɛhyɛ selenite nkatanim no ase.
Dɛn nti na wɔfrɛ selenite satin spar, ɔkwan biara so? “Satin” kyerɛ saa ahorow yi a ɛhyerɛn te sɛ silika kosi ahwehwɛ. “Spar” yɛ asɛmfua dedaw a wɔde tu fam ma ahwehwɛ a ɛyɛ mmerɛw a ɛyɛ mmerɛw sɛ wobehu ahwehwɛ anim na ɛte sɛ nea ɛhyerɛn na ɛyɛ torotoro.
Nea ɛda nsow ne sɛ, satin spar nso wɔ hardness ranking a ɛkorɔn (3) sen selenites afoforo.
Gypsum Nhwiren
Gypsum nhwiren yɛ selenite ahwehwɛ a ɛyɛ nhama a ɛwɔ nsusuwii ahorow nanso wonim no kɛse sɛ ɛyɛ ahwehwɛ a ɛte sɛ nhwiren a ɛyɛ kurukuruwa. Gypsum nhwiren “nhwiren” no nyɛ pɛ kɛse wɔ ɔkwan ne ne kɛse mu, bere a anhweatam so nhwiren “nhwiren” te sɛ rose a ɛrefefɛw. Gypsum nhwiren nso hyerɛn kɛse.
Gypsum nhwiren ahwehwɛ taa yɛ abien. “Twinning” yɛ bere a ahwehwɛ bi fi ase nyin ɔkwan biako so, afei ɛsakra ne kwan ma ɛyɛ ahwehwɛ “twin” a ɛne ne ho hyia a ɛbata ho.
Saa ahwehwɛ a ɛyɛ abien yi nso tumi twitwiw, na ɛma nneɛma te sɛ:
Ram mmɛn
Swallowtail a ɛyɛ fɛ
Duck-bill a ɛyɛ ananse
Mpataa dua
Agyan a wɔde kyerɛ
Afei, momma yɛnsesa gears mfa nhwehwɛ selenite metaphysical su ahorow mu!
Selenite Crystal Nkyerɛase & Abakɔsɛm
Selenite yɛ hann, pefeeyɛ, ne ɔsoro ɔbea su ho sɛnkyerɛnne. Selenite palm stone ntease no yɛ nea ɛtew adwemmɔne ho.
Edin “selenite” no fi Hela kasa mu selēnitēs lithos , a ɛkyerɛ “ɔsram bo” no mu. Nsusuwii kakraa bi wɔ hɔ a ɛfa nea enti a wɔtoo din yi ho:
Pearly luster wɔ cleavages so te sɛ ɔsram a ɛhyerɛn
Abakɔsɛm mu gyidi a ɛne sɛ selenite brɛɛ ase na ɛkɔɔ so yɛɛ kɛse bere a ɔsram no kyinhyia no
Selenite a wɔtaa de di dwuma sɛ nneɛma a wɔde yɛ mfɛnsere a wɔde hwɛ ɔsram
Wɔde hyɛ Helafo ɔsram nyamewa, Selene (a wɔsan frɛ no Artemi) anuonyam .
Abakɔsɛm
Ná selenite a edi kan a wɔde dii dwuma no fã kɛse no ara yɛ nwene. Mfe 5,000 a atwam ni no, Misrifo de gypsum dii dwuma sɛ ɔfasu so plaster, a mprempren wɔfrɛ no Plaster of Paris.
Wɔde gypsum ne selenite dii dwuma de sesaa wɔn ho wɔn ho kosii 1400 mfe no mu, bere a selenite fii ase kaa gypsum ahwehwɛ a ɛyɛ mmerɛw nkutoo ho asɛm no.
Selenite din ho kyerɛwtohɔ a edi kan no wɔ nhoma Mineralogia, eller Mineralriket a Swedenni nyansahufo J. G. Wallerius kyerɛwee wɔ 1747 mu no mu.
Amerikani aboɔden abo ho ɔbenfo George F. Kunz kyerɛw satin spar abo a ɛte sɛ nkesua a efi Misraim wɔ 1913 mu ho asɛm, na ɔkae sɛ Misrifo frɛɛ no “Farao Nkesua” na wogye di sɛ ɛbɔ ho ban.
Sɛ yɛreka ahintasɛm mu nneɛma ho asɛm a, dɛn na selenite ɔbo no ye ma?
Selenite Ayaresa Nneɛma
Wobu selenite sɛ abo a ɛsa yare a ano yɛ den sen biara a wɔde tew, bɔ ho ban, na ɛma emu da hɔ no mu biako. Saa selenite su ahorow yi te sɛ aboɔden abo afoforo a enni kɔla .
Selenite yɛ ahwehwɛ a wɔtaa de tew abo ho no mu biako, adeyɛ a wɔde yi ahoɔden bɔne a wɔakyekye a wɔde asie ɔbo no mu no fi hɔ ma enti ebetumi ayɛ adwuma yiye ama ayaresa.
Wɔ sotɔɔ ahorow a wɔtɔn nneɛma a ɛyɛ ahintasɛm mu no, ebia wubehu selenite charge plate anaa crystal. Nanso dɛn ne selenite charging crystal? Eyinom yɛ honhom fam nnwinnade a wɔde tew aboɔden abo foforo ho na “wobɔ ka.” Sɛ wɔde ahwehwɛ bi charge a, ɛma ɛyɛ ayaresa wosow kɛse bere tenten.
Dɛn ne honam fam, nkate fam, ne chakra selenite mfaso horow?
Nipadua mu Ayaresa
Ebia mfaso a ɛwɔ honam fam selenite ɔbo so no bi ne sɛ ɛbɛma calcium a ɛtwetwe no atu mpɔn na ɛma ɛyɛ mmerɛw sɛ ɛbɛsakra. Selenite poma nso taa yɛ nea wɔde fra, anaasɛ wɔde asɛm no to nhyɛso nsɛntitiriw so na ama ɛyaw no afi hɔ.
Bio nso, wɔkyerɛ sɛ selenite ma awo yɛ kɛse, na ɛhwɛ ma ɛna no ne akokoaa no nya akwahosan bere a wɔyem no.
Nkate mu Ayaresa
Saa “Ɔbo a Ɛma Adwene Mu Da hɔ” yi betumi akanyan adwene no bere a ɛrehyehyɛ nsusuwii ahorow no, na ama wɔanya tebea horow a emu yɛ den ho nhumu. Wɔkyerɛ sɛ mfaso a ɛwɔ selenite bracelet so no ma asomdwoe ne wɔn ho a wohu no yɛ kɛse ma gyinaesi a nyansa wom.
Wɔ abusuabɔ mu no, selenite betumi ahyɛ bɔne fafiri ne nokwaredi ho nkuran bere a eyi ahoɔyaw fi hɔ no. Gypsum nhwiren agye din sɛ wɔde ahoɔden a ɛma awerɛhyem na ɔdɔ hyɛ akuw ma.
Chakra Ayaresa
Chakra abo siesie chakra a asiw ano, anaa ahoɔden mfinimfini no ho sɛnkyerɛnne bɔne denam chakra no a wobue so. Eyi ma chakra no ho sɛnkyerɛnne pa no da adi.
Selenite chakra abo ye ma aniwa chakra a ɛto so abiɛsa no. Ɛwɔ wo moma so, aniwa chakra a ɛto so abiɛsa no na ɛkyerɛ honhom mu nhumu, nkate, ne wiase no ntease kwan.
Sɛ wote nka sɛ woakɔda w’adwene mu anaasɛ wo ntam atwa a, ebia w’ani a ɛto so abiɛsa no besiw. Fa selenite di dwuma, na w’ani a wobɛbue ne mprɛnsa so no bɛboa wo ma woanya honhom fam nyansa kɛse.
So wubetumi de selenite adwennwen nneɛma ho? Yɛkamfo kyerɛ sɛ ɛnyɛ saa! Adwendwene yɛ ɔkwan a wɔtaa fa so na mfaso wɔ so a wɔfa so sa chakra yare.
Selenite Aboɔden abo Nneɛma a Ɛwɔ Hɔ
Nneɛma a ɛka selenite bo a ɛsom no bi ne ne kɔla, ne twitwa, sɛnea ɛda adi pefee, ne hyerɛn, ne sɛnea wɔde sa yare.
Ahosuo
Selenite kɔla ahorow betumi ayɛ soronko na ɛtɔ mmere bi a ɛda nsusuwso a ɛte sɛ marble adi. Kɔla ahorow fi nneɛma ahorow mu, nanso ahorow biara wɔ kɔla ahorow a wɔtaa de di dwuma:
Selenite : Enni kɔla, fitaa, anaa bruu a ɛyɛ mmerɛw
Satin Spar : Fitaa anaa peach
Anhweatam so Rose : Rose a ɛyɛ tan, ɛyɛ bruu, ɛyɛ kɔkɔɔ-kɔkɔɔ, mfutuma
Gypsum Nhwiren : Fitaa, kɔkɔɔ, tan, ahabammono, anaa fitaa
Anhweatam so rose ne gypsum nhwiren taa nya anhwea a ɛbata ho no kɔla.
Twa
Ɛkame ayɛ sɛ selenite abo nni afã biara da . Ɛsɛ sɛ wotwitwa chatoyant satin spar yɛ no cabochon na ama wɔada “ɔkraman aniwa” nkɛntɛnso adi. Abantenten a wɔasen a wɔde selenite ayɛ ne nneɛma a wɔde sɛn afasu so nso abu so.
Dodow no ara wɔ nsusuwii soronko te sɛ selenite kuruwa anaa prɛte. Sotɔɔ pii tɔn ahwehwɛ nhwiren a wɔantwitwa, gypsum anaa anhweatam so rose selenite raw crystal nhwɛsode ahorow ma wɔn abɔde mu ahoɔfɛ, sɛ́ ebia wɔde siesie selenite ahwehwɛ kɔnmuade.
Nsɛm a Wɔka Kyerɛ & Luster
Selenite a ɛyɛ mmerɛw no ho yɛ na na ɛsom bo sen biara. Wɔ luster-witre, pearly kosi vitreous nhwɛsode ahorow no som bo sen biara, na dull specimens nso bo nyɛ den koraa.
Ayaresa ahorow
Ayaresa a wɔtaa de sa selenite ne aduru a wɔde kɔla, nea wɔde yɛ fitaa, ne nea wɔde kata so. Ebia wɔn a wɔyɛ agude bɛhyɛ selenite kɔla anaasɛ wɔde ayɛ fitaa na ama ne kɔla atu mpɔn. Ayaresa a ɛma ahoɔden te sɛ nea wɔde kata so no rensakra bo a ɛsom no anaasɛ ɛbɛma bo no akɔ soro ankasa.
Selenite Formation & Nneɛma a Wɔde Yɛ Adwuma
Selenite ne gypsum nhwiren ahwehwɛ a ɛyɛ mmerɛw yɛ tete abodan a wɔde abo a wɔfrɛ no limestone ayɛ mu. Nsu fa limestones no mu, na ɛboaboa nneɛma a ɛwɔ abo mu (a ɛne sulfate ne calcium) ano. Ɔhyew a efi magma a ɛwɔ ase hɔ no ma nsu no tɔ na aboɔden abo no yɛ ahwehwɛ.
Selenite ahwehwɛ nyin ntɛmntɛm dɛn? Nkakrankakra paa. Nyansahufo kyerɛ sɛ selenites a ɛda adi pefee wɔ Mexico Cave of the Crystals mu no gyee bɛboro mfe 500,000 ansa na wɔayɛ. Nanso, gypsum nhwiren ne anhweatam so nhwiren ba wɔ mfe du du kosi mfehaha pii mu.
Anhweatam so rose selenites ba wɔ mmeae a ɛhɔ yɛ kusuu na anhwea wɔ te sɛ anhweatam, dɔte mpa, anaa nkyene a ɛyɛ hyew. Ɛsɛ sɛ nneɛma a atwa yɛn ho ahyia no nya nsu a ɛsen bere biara ne calcium sulfate.
Nsu boaboa calcium sulfate ano na ɛyɛ nwini wɔ anhwea no mu. Nsu no tɔ, na ɛma ahwehwɛ akuwakuw. Mframa ne tumi afoforo ma anhwea hyɛ ahwehwɛ no ma na/anaasɛ ɛkata so.
Mmeae a Wɔtu Tuo
Ɛhe na wohu selenite wɔ abɔde mu? Sɛ Cave of the Crystals a yɛadi kan aka ho asɛm wɔ Mexico no da nkyɛn a, selenite afoforo a ɛda nsow wɔ:
Argentina
Australia
Brazil
Chile
Greece na ɛwɔ hɔ
Italy
Japan
Mexico
Poland
Russia
Sahara Anhweatam (anhweatam so nhwiren) .
U.S.A. (Utah, Colorado, New York) na ɛwɔ hɔ nnɛ.
Afei, selenite bo yɛ ahe?
Selenite Bo & Ne Bo
Selenite crystal bo no nyinaa yɛ fɛ yiye. Nneɛma dodow no ara yɛ nneɛma a wɔasen anaasɛ selenite ahwehwɛ a wɔannoa. Selenite mineral nhwɛsode ahorow no taa yɛ $0.04-$0.16 wɔ carat biara mu.
Nneɛma a wɔtaa de yɛ selenite a wɔtɔn no kɛse no bo ahorow ni:
Wands : $5-$20 (bɛyɛ $0.01 wɔ carat biara mu)
Koma : $5-$10 ma nketewa ne $30-$50 ma akɛse (abien no nyinaa $0.02-$0.05 wɔ carat biara mu)
Pyramid : $15-$25 ($0.02-$0.04 wɔ karat biara mu) .
Nkuruwankuruwa : $20-$60 ($0.01-$0.02 wɔ carat biara mu)
Mpɛn pii no, pyramid anaa poma a ne bo yɛ den fi LED bɔlɔb a wɔde ka ho de yɛ selenite akanea.
Selenite Ɔhwɛ ne Nsiesiei
Aboɔden abo a wɔhwɛ so ho hia bere nyinaa, nanso ɛho hia titiriw ma ɔbo a ɛyɛ mmerɛw te sɛ selenite.
So selenite betumi akɔ nsu mu? Gypsum biara bɛpete sɛ wogyaw ma ɛkɔ nsu mu a. Ɛno nti na ɔkwan a ahobammɔ wom sen biara a wobɛfa so atew selenite ho ne sɛ wode brɔs a ɛyɛ mmerɛw anaa ntama a wɔde microfiber ayɛ bɛhohoro ɔbo no ho brɛoo no.
Sɛ wode selenite gu nsu mu a, dɛn na woyɛ? Mma wo ho nnyɛ wo hu! Nea wobɛyɛ ara ne sɛ wubeyi afi mu na woayow koraa ntɛm ara sɛnea wubetumi.
Sɛ wopɛ polishing a, wobɛyɛ dɛn ahyerɛn selenite? Yɛhyɛ nyansa sɛ fa kɔma obi a ɔyɛ agude ho adwuma yiye. Nanso, ebinom siesie selenite wɔ fie denam sandpaper a emu duru yɛ 600 anaa nea ɛba fam a wɔde srasra so, afei wɔde aluminium oxide polishing paste gu so na wɔde aboa nhoma a ɛyɛ mmerɛw petepete mu.
Sɛ wohwɛ w’ankasa akwahosan a, so selenite yɛ awuduru? Selenite abo nyɛ awuduru, efisɛ selenium nni mu. Sodium selenite (a selenium wom na ɛne selenite ahwehwɛ nni abusuabɔ) betumi ayɛ awuduru.
Ma Wo Honhom Nhyerɛn Ne Selenite!
Seesei de, wubetumi ahu sɛ selenite wɔ su ahorow pii a ɛyɛ nwonwa. Esiane sɛ selenite yɛ ahwehwɛ akɛse, nhwiren ahorow a ɛyɛ fɛ, ne ayaresa tumi a ano yɛ den nti, ɛyɛ ahwehwɛ a ɛfata sɛ yɛma yɛn ani gye ho.
Honhom fam no, selenite ahwehwɛ a wubenya no betumi ayɛ anammɔn a edi kan a wobɛtu akɔ nhumu a ɛkorɔn mu na woanya wo mu ɔsram nyamewa no.
搜尋Gemstone Encyclopedia
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Shortite yɛ aboɔden abo a wɔntaa nhu ne aboɔden abo a ɛntaa nsi, na wɔtaa hu no sɛ ahwehwɛ a enni kɔla anaasɛ ɛyɛ kɔkɔɔ a ɛte sɛ wedge. Sua shortite boɔ, abakɔsɛm, ne ne su wɔ akwankyerɛ yi mu!
9th Dec 2024
Senarmonite yɛ antimony aboɔden abo a ɛnyɛ nea wɔtaa de di dwuma kɛse wɔ mfiridwuma mu nanso ɛtɔ mmere bi a wɔboaboa ano sɛ aboɔden abo a wɔntaa nhu anaasɛ ahwehwɛ a ɛte sɛ ahwehwɛ. Hwehwɛ senarmonite su ahorow, sɛnea wɔde di dwuma, ne bo, ne abakɔsɛm nyinaa.
27th Nov 2024
Tantalite yɛ aboɔden abo a ɛyɛ kɔkɔɔ, bruu, anaa tuntum kuw bi a element a ɛho yɛ na na ɛsom bo a wɔfrɛ no tantalum wom. Hwehwɛ sɛnea wɔde tantalite aboɔden abo di dwuma, abakɔsɛm, ne bo, ne ne su wɔ akwankyerɛ yi mu!
11th Nov 2024
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How To's is where you will find helpful articles from gem Rock Auctions on how to cut gemstones, select gemstones and buy gemstones.
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